Thursday, 1 October 2026

Chapter 6. The Map of the House

Mara and Pip did not move.

The footsteps below them came closer.

The footsteps above them came closer too.

Step.

Step.

Step.

Step.

Pip whispered, “Perhaps we should choose one direction.”

“Which one?”

“The quieter one.”

Mara listened.

The footsteps above stopped.

The footsteps below stopped.

Everything was silent.

Then a voice from above said:

“Good morning, Mara.”

A voice from below said:

“Good morning, Mara.”

Mara closed her eyes.

“Which one is real?”

Pip thought about it.

“Perhaps neither.”

“That's not helpful.”

“I've noticed that.”

Mara opened her eyes.

The staircase was empty.

Both voices were gone.

At the top was a small landing.

At the bottom was another small landing.

And somehow, although they had not moved, Mara was standing at both.

Pip was too.

Mara looked down.

She could see herself standing below.

The other Mara looked up.

They waved at each other.

Pip waved too.

The other Pip waved back.

“That's enough,” said Mara.

She sat down.

The other Mara sat down.

Pip sat beside her.

The other Pip sat beside his Mara.

“We need a map,” said Mara.

Pip nodded.

“Yes.”

“A proper map.”

“Yes.”

“One that doesn't change.”

Pip hesitated.

“Do you think the house will agree?”

“No.”

“Then why make one?”

“So we can know where we are.”

Mara took a pencil from her pocket.

She had been carrying it since school.

She found a scrap of paper.

On it she drew a square.

“This is the room.”

She added a door.

“This is the door.”

She drew a corridor.

“This is the corridor.”

She drew the staircase.

“This is the staircase.”

Pip watched.

“What about the other staircase?”

“There isn't one.”

“There is.”

“Not on the map.”

Pip considered this.

“That's convenient.”

Mara drew it.

Now there were two staircases.

She drew the garden.

The house.

The library.

The green door.

The hall of mirrors.

The room with the changing furniture.

The tiny door.

The staircase that went somewhere else.

She drew everything they could remember.

Soon the map filled the page.

Pip looked at it.

“It looks like a spider.”

Mara looked.

It did.

A very complicated spider.

“With doors,” she said.

“Perhaps it's a house-spider.”

“Perhaps.”

She drew another line.

The map changed.

Not on the paper.

The house changed.

A door appeared in the wall beside them.

Pip stared.

“You drew that.”

“I know.”

“So the map made the door.”

“Or the door made the map.”

Pip frowned.

“That's worse.”

Mara drew a window.

A window appeared.

She drew a staircase.

A staircase appeared.

She quickly crossed it out.

The staircase disappeared.

They stared at each other.

Pip took the pencil.

He drew a biscuit.

Nothing happened.

He drew another.

Still nothing.

“Perhaps it only draws rooms.”

“Try a chair.”

Pip drew a chair.

A chair appeared.

He drew a table.

A table appeared.

He drew a cat.

Nothing happened.

“That's disappointing.”

Mara took the pencil.

She drew a door.

Nothing happened.

She drew another.

Nothing.

A third.

Nothing.

“It's stopped.”

Pip pointed to the map.

“Perhaps it's full.”

Mara looked at the paper.

There was hardly any space left.

She turned it over.

The other side was blank.

She began again.

A square.

A door.

A corridor.

A staircase.

The house changed.

Mara stopped.

She looked at the map.

Then at the house.

Then back at the map.

“I think I know what it's doing.”

“What?”

“It isn't showing us where the rooms are.”

“What is it showing?”

“Where the rooms can be.”

Pip looked impressed.

“That's much more confusing.”

Mara continued drawing.

She drew a room with no door.

The house produced a room with no door.

She drew a door with no room.

A door appeared in the wall.

She drew two rooms connected by a staircase.

The house rearranged itself.

She drew the same two rooms connected by a mirror.

The house rearranged itself again.

The map wasn't describing the house.

It was changing what the house could become.

Pip took the pencil.

He drew a tiny square.

“What is that?”

“Nothing.”

“You can't draw nothing.”

“I just did.”

Mara looked.

Inside the square was an empty space.

She drew another square around it.

Then another.

Then another.

The house began to tremble.

“Stop.”

Pip stopped.

The trembling ceased.

Mara stared at the nested squares.

“What were you trying to draw?”

“A room inside a room inside a room.”

“Why?”

“I wondered how far it would go.”

Mara folded the paper.

“We aren't doing that.”

“Fair enough.”

They walked back towards the staircase.

At the foot of it was a door.

Above the door was a brass plaque.

MAP ROOM

Mara opened it.

Inside was a very large table.

On the table was a map.

It covered the entire surface.

Pip walked around it.

“That's our map.”

Mara looked closer.

It was.

Every room they had visited was there.

The green door.

The garden.

The house.

The mirrors.

The impossible staircase.

Even the little room with the changing furniture.

But there was something else.

A small blank square.

In the middle of the map.

Mara touched it.

The paper was warm.

“What is that?”

Pip leaned over.

“I don't know.”

Mara looked around the room.

On the wall was another map.

The same map.

Except the blank square was slightly larger.

And on another wall was another.

Larger again.

And another.

And another.

Each map contained the previous map.

The final map showed the room they were standing in.

Mara's head began to hurt.

“Pip.”

“Yes?”

“We're on the map.”

“Yes.”

“So where are we?”

Pip pointed.

At the centre of the map was a tiny square.

“This is us.”

Mara looked.

The square had a little door drawn inside it.

She opened her mouth.

Then closed it.

She reached into her pocket.

Her pencil was gone.

She checked again.

Nothing.

Pip looked at his hands.

His biscuit was gone too.

“That's odd.”

Mara looked back at the map.

The tiny door was open.

Behind it was a staircase.

And on the staircase stood two tiny figures.

One was holding a pencil.

The other was holding a biscuit.

Pip stared.

“That looks like us.”

“It is us.”

“But we're here.”

Mara looked at the tiny figures.

The tiny figures looked back.

One of them waved.

Mara waved.

The other Pip raised his biscuit.

Pip raised his empty hand.

“That seems unfair.”

Then the tiny Mara drew something on the tiny map.

A small square.

Around it, another square.

Then another.

Then another.

The house shuddered.

The table shook.

The maps fluttered.

Mara grabbed the edge.

“Stop!”

The tiny Mara stopped drawing.

Everything became still.

Mara stared at the map.

There was now a small circle around the room they were standing in.

Outside the circle was the rest of the house.

Inside it was only them.

Pip looked at her.

“What does the circle mean?”

“I don't know.”

“Can you erase it?”

Mara reached for the pencil.

It was back in her pocket.

She took it out.

The map showed the circle.

She rubbed it with her finger.

Nothing happened.

She crossed it out.

The circle became darker.

She tried again.

Darker still.

Pip leaned closer.

“Perhaps it's not a circle.”

“What is it?”

“A boundary.”

Mara stopped.

The word seemed to echo through the room.

Boundary.

Boundary.

Boundary.

Then someone knocked on the map.

Three times.

Knock.

Knock.

Knock.

Mara looked down.

The sound had come from the blank square.

She bent closer.

The paper moved.

Something was pushing against it from underneath.

Pip whispered:

“Don't lift it.”

Mara lifted it.

Under the map was another map.

And under that one was another.

And underneath all of them was a single sentence:

THIS MAP DOES NOT CONTAIN THE ROOM IN WHICH IT IS DRAWN.

Mara read it twice.

Pip read it once.

Neither spoke.

Then Pip said:

“I think we have found the missing room.”

Mara looked around.

The room was exactly as it had been.

Table.

Maps.

Door.

Walls.

Ceiling.

Floor.

Nothing missing.

She looked back at the sentence.

“No.”

“What?”

“We haven't found it.”

“Why not?”

“Because if the map says the room isn't on the map…”

She looked at the blank square.

“…then the missing room must be somewhere the map can't show us.”

Pip nodded slowly.

“Where?”

Mara looked at the walls.

Then at the ceiling.

Then at the floor.

Finally she looked at the piece of paper in her hand.

“I think,” she said, “we're standing on it.”

The map gave a tiny sigh.

Then it folded itself in half.

And when Mara opened it again, there was a new room drawn on the map.

It was labelled:

HERE.

Chapter 5. The Staircase That Went Somewhere Else

The staircase went down.

Mara knew this because she could feel herself going down.

One step.

Then another.

Then another.

Pip followed behind her.

“How many?” he asked.

“Steps?”

“Yes.”

“Twenty-three.”

Pip counted.

“Twenty-four.”

Mara stopped.

“That can't be.”

She looked back.

Pip was standing on a step.

“How many have you counted?”

“Twenty-four.”

“I counted twenty-three.”

They looked at the staircase.

It seemed to have exactly as many steps as it needed.

“Count again,” said Mara.

Pip did.

“Twenty-two.”

Mara laughed.

“You're getting worse.”

“I am counting perfectly.”

“How many?”

“Twenty-five.”

Mara looked down.

There were twenty-five steps between them and the bottom.

She looked back up.

There were seven steps behind Pip.

“That doesn't add up.”

Pip shrugged.

“Perhaps the staircase doesn't add.”

They continued.

At the bottom was a door.

It was red.

Mara opened it.

Behind it was the top of the same staircase.

They stared.

Pip closed the door.

“Perhaps we should go back up.”

Mara opened it again.

The staircase was still there.

They climbed.

At the top was another door.

Mara opened it.

Behind it was the bottom of the staircase.

Pip sat down.

“I don't like stairs anymore.”

Mara looked at the steps.

“Perhaps they're not stairs.”

“They look like stairs.”

“Yes.”

“They behave like stairs.”

“Yes.”

“They take you up and down.”

“Usually.”

Pip looked at her.

“What's unusual about these?”

Mara thought.

“I don't think they take you anywhere.”

“They've taken us somewhere.”

“Where?”

Pip looked around.

Neither of them knew.

Mara walked back down.

Halfway there, she stopped.

“Pip.”

“Yes?”

“Don't move.”

“I'm not.”

“Look down.”

Pip looked.

The staircase had changed.

It was no longer inside a house.

It was outside.

The steps stretched across a field.

At the bottom stood the blue house.

At the top stood the library.

Pip blinked.

“We're outside.”

“Yes.”

“But I can still see the walls.”

“So can I.”

“The walls are over there.”

“Yes.”

“And here.”

“Yes.”

“That seems excessive.”

Mara walked down another step.

The field became a hallway.

She took another.

The hallway became a garden.

Another.

The garden became a kitchen.

Another.

The kitchen became the library.

Another.

The library became the blue house.

The staircase continued.

It went through every place they had visited.

The green door.

The room with the changing furniture.

The hall of mirrors.

The garden.

The library.

The house.

Everything was connected by the same staircase.

Pip looked pleased.

“We've found the map.”

“What?”

“The staircase is the map.”

Mara shook her head.

“No.”

“Why not?”

“Because a map doesn't change when you walk on it.”

Pip thought about this.

“Perhaps this one does.”

They continued.

The staircase became narrower.

Then wider.

Then it turned upside down.

Mara found herself walking along the underside of the steps.

Pip was beside her.

“Are we going up?”

“No.”

“Down?”

“No.”

“Then where?”

Mara looked ahead.

“I don't know.”

At the next landing stood a door.

Above it was a sign.

THIS WAY TO WHERE YOU WERE.

Pip opened it.

They stepped through.

They were standing in the garden.

Mara looked around.

The blue house was at the end of the path.

Everything looked normal.

The apple trees.

The fountain.

The grass.

Even the two front doors.

Pip sighed with relief.

“Home.”

Mara shook her head.

“No.”

“Why not?”

She pointed.

There were three apple trees.

But when they had first arrived, there had been three.

The fountain was in the same place.

The house was the same colour.

The path curved in exactly the same way.

Everything was right.

Too right.

Mara walked to the nearest tree.

There was a small scratch in the bark.

She had made it earlier.

She remembered.

Pip came over.

“What's wrong?”

“The tree remembers us.”

Pip looked at the scratch.

“That's good.”

“No.”

“Why?”

“Because we haven't been here yet.”

Pip frowned.

They stood in silence.

Then Mara heard something.

A footstep.

Behind them.

They turned.

Someone was walking down the garden path.

It was Mara.

She was holding the glass tube.

Beside her was Pip.

They were coming towards them.

Pip stared.

“That's us.”

“Yes.”

“But we're here.”

“Yes.”

The other Mara stopped.

She looked at them.

For a moment, neither pair moved.

Then the other Pip said:

“We've been looking for you.”

Mara's mouth went dry.

“Why?”

The other Mara held up the glass tube.

“Because you left it behind.”

Mara looked at her own hands.

She was not holding anything.

She looked at the other Mara.

“Where did you get that?”

“You gave it to me.”

“I didn't.”

“You will.”

Pip whispered:

“That's confusing.”

The other Pip nodded.

“It gets worse.”

He pointed towards the house.

One of its doors was open.

Inside was a staircase.

The staircase went up.

Mara looked at the staircase.

Then at the other Mara.

“Where does it go?”

The other Mara smiled.

“Somewhere else.”

“Where?”

She looked towards the sky.

“Here.”

Mara frowned.

“That's not somewhere else.”

The other Mara shook her head.

“It is from the other direction.”

Then she turned and walked towards the house.

The other Pip followed.

Mara watched them disappear through the door.

Pip looked at her.

“Do we follow?”

“Yes.”

“Of course.”

They entered the house.

The staircase was waiting.

It was ordinary again.

Seven steps.

Then another seven.

Then another seven.

Mara counted carefully.

Seven.

Seven.

Seven.

At the top was a landing.

There was a mirror.

Mara looked into it.

Her reflection looked back.

But the reflection was holding the glass tube.

Mara raised her hand.

The reflection did not.

Instead, it held out the tube.

Mara stepped closer.

The reflection stepped closer too.

She reached towards the glass.

The reflection placed the tube against it.

There was a tiny click.

The mirror opened.

Behind it was a staircase.

Mara stared.

Pip stared.

“How many staircases are there?” he asked.

Mara looked down the new staircase.

“I don't know.”

She stepped onto it.

Pip followed.

They began to climb.

After ten steps, Mara looked back.

The house had disappeared.

After twenty, the garden had disappeared.

After thirty, the sky had disappeared.

After forty, there was only the staircase.

At fifty, Mara stopped.

Pip bumped into her.

“What?”

“Listen.”

They listened.

Far below them, someone was climbing.

Step.

Step.

Step.

Coming closer.

Mara looked down.

Nothing.

Then a voice called up the staircase.

“Wait for us!”

Mara knew the voice.

It was hers.

She looked at Pip.

Pip looked at her.

Neither moved.

The footsteps came closer.

And somewhere above them, another set of footsteps began coming down.

Chapter 4. The Other Side of the Glass

Mara stepped through the mirror.

She expected cold glass.

Instead, she stepped onto a carpet.

She looked back.

The mirror was still there.

But it was now behind her.

And in it, she could see herself.

The reflected Mara looked surprised.

Mara raised a hand.

The reflection raised hers.

Mara lowered her hand.

The reflection lowered hers.

“Good,” said Mara.

The reflection smiled.

“Very good,” said Mara.

The reflection nodded.

Mara waited.

The reflection waited.

“Are you going to do everything I do?”

The reflection shook her head.

Mara stopped smiling.

The reflection was still smiling.

“That isn't what I did.”

“I know,” said the reflection.

Mara jumped.

The voice sounded exactly like hers.

But it had come from the other side of the glass.

“You can talk?”

“Of course.”

“Why didn't you before?”

“You hadn't asked.”

Mara considered this.

“That's not very helpful.”

“No.”

“Where is Pip?”

The reflection pointed behind Mara.

Mara turned.

Pip was sitting at a table.

He was eating a biscuit.

Mara ran towards him.

“Pip!”

He looked up.

“Oh. There you are.”

“Where have you been?”

“Here.”

“You disappeared.”

“I didn't.”

“I saw you disappear.”

Pip shrugged.

“You saw a room disappear.”

Mara looked around.

They were in a large hall.

There were mirrors everywhere.

Some were tall.

Some were tiny.

Some were round.

Some were so narrow that Mara could only see one eye at a time.

In one mirror, the hall was empty.

In another, it was full of chairs.

In another, it had no ceiling.

In another, rain was falling upwards.

Mara walked towards the nearest mirror.

She could see herself.

She waved.

The reflection waved.

She turned around.

The reflection turned around.

She sat down.

The reflection sat down.

Then the reflection looked at Pip.

Mara did not.

Mara looked at the reflection.

The reflection looked back at her.

“That's not right.”

“No,” said Pip.

He took another bite of his biscuit.

“It isn't.”

“What did she see?”

Pip swallowed.

“You.”

“I was looking at her.”

“She was looking at you.”

Mara frowned.

“But I was looking at her.”

“Yes.”

“That doesn't make sense.”

“No.”

Pip smiled.

“I've been waiting for you to notice.”

Mara turned back to the mirror.

The reflection was no longer copying her.

It was watching her.

“What's your name?” Mara asked.

The reflection thought about this.

“I don't know.”

“You must have a name.”

“Do you?”

“Yes.”

“What is it?”

“Mara.”

“That's the name you use.”

“What other name is there?”

The reflection smiled.

“I was hoping you would know.”

Mara didn't like that answer.

She looked at another mirror.

In it, she was standing beside the green door.

In another, she was climbing the staircase.

In another, she was holding the glass tube.

In another, she was sitting beside Pip.

But in that mirror, Pip was holding the biscuit.

In another, Mara was holding it.

In another, neither of them was holding it.

Mara walked from mirror to mirror.

Each showed a different arrangement.

But all of them were recognisably the same two children.

“Which one is real?” she asked.

Pip shrugged.

“Probably all of them.”

“That can't be.”

“Why not?”

“Because we're only here.”

“Perhaps they're only there.”

Mara thought about this.

She looked into the nearest mirror.

The other Mara was looking back.

“Do you know what happens if I break one?”

The reflection shook her head.

“No.”

“Would you break?”

The reflection considered.

“Would you?”

Mara picked up a small stone from the floor.

Pip stood up.

“I wouldn't.”

“Why?”

“Because we don't know what it would break.”

Mara lowered the stone.

The reflection smiled.

“Good choice,” she said.

Mara stared.

“You sound like me.”

“I am you.”

“No, you're not.”

“Then who am I?”

Mara had no answer.

Pip wandered towards a tall mirror.

He looked into it.

In the mirror, another Pip was standing in the same place.

Except he wasn't holding a biscuit.

The other Pip looked down.

Then he looked up.

He said something.

Pip put his hand against the glass.

The other Pip did the same.

“What did he say?” Mara asked.

“I don't know.”

“Ask him.”

Pip moved his lips.

The other Pip moved his lips.

Neither could hear the other.

Mara came closer.

“Perhaps the glass is too thick.”

She pressed her ear against it.

The other Mara appeared beside the other Pip.

She pressed her ear against the glass too.

Mara looked at her.

The other Mara looked back.

Then both of them began to laugh.

Mara didn't know why.

Neither did the other Mara.

But they couldn't stop.

Soon Pip was laughing too.

The other Pip laughed.

The whole hall filled with laughter.

Mara stepped away.

The sound continued.

She looked around.

There were hundreds of reflections now.

Every mirror was full of them.

Some were laughing.

Some were watching.

Some were talking to one another.

Some were looking directly at Mara.

And one reflection was crying.

Mara walked towards it.

It was a little girl.

She was sitting alone in a room.

Mara touched the glass.

The girl looked up.

“Are you lost?” Mara asked.

“Yes.”

“Where are you trying to go?”

“Here.”

Mara frowned.

“Here?”

The girl nodded.

She pointed towards Mara.

“I've been trying to get to your side.”

Mara looked behind her.

There was no door.

“How?”

The girl pointed at the glass tube.

Mara realised she was still holding it.

She had forgotten about it.

“How does this work?”

The girl shook her head.

“You don't use it.”

“What do I do?”

“You turn it.”

“Turn what?”

“Everything.”

Mara looked at Pip.

He was standing very still.

“What does she mean?”

Pip looked at the tube.

“Perhaps she means the room.”

“How?”

“I don't know.”

The girl in the mirror stood up.

She walked towards the glass.

She placed one hand against it.

Mara placed her hand against the same place.

Their palms met through the glass.

The girl whispered:

“Don't try to come here.”

“Why?”

“Because I'm already coming there.”

The glass trembled.

Mara pulled her hand away.

The mirror cracked.

Not broken.

Cracked.

A single line appeared from top to bottom.

Then another.

Then another.

The cracks spread across the whole surface.

But instead of shattering, the mirror divided into dozens of smaller mirrors.

Each showed a different room.

In one, Mara was standing alone.

In another, Pip was alone.

In another, they were together.

In another, the little girl stood beside them.

In another, the green door was open.

In another, the blue house stood in a garden.

In another, the library wall had disappeared completely.

Mara turned to Pip.

“Which one are we in?”

Pip looked at the mirrors.

Then at Mara.

“I don't think that's the right question.”

“What is?”

He pointed.

One of the little mirrors had no reflection at all.

It was completely dark.

Except for a small green door.

Mara walked towards it.

Pip followed.

The door was tiny.

Mara knelt down.

There was a brass handle.

She reached for it.

“Wait,” said Pip.

“What?”

“Look.”

He pointed to the dark glass.

Something was written across it.

Mara leaned closer.

The words were very small.

She read them aloud.

THIS SIDE OF THE GLASS IS THE OTHER SIDE OF THE GLASS.

Pip nodded.

“I think the house is getting worse.”

Mara smiled.

“Or better.”

She opened the little door.

Behind it was a staircase.

It went down.

Mara looked at Pip.

“Do you think we should?”

“No.”

“Good.”

She stepped through.

Pip sighed.

Then followed.

Behind them, every mirror in the hall turned slowly towards the door.

And in every reflection, the little green door closed.

Chapter 3. The Room That Changed Its Mind

The staircase with eight steps led to a room.

At least, Mara thought it was a room.

It had four walls, a ceiling, a floor, a window and a door.

Those were usually reliable signs.

Pip walked in first.

“It's empty.”

“It isn't.”

“There isn't anything here.”

“There is a chair.”

Pip looked behind him.

There was no chair.

Mara pointed.

“There.”

Now there was a chair.

It was a small wooden chair with a red cushion.

Pip walked over and touched it.

“Definitely a chair.”

Mara smiled.

“Good.”

Pip looked at her suspiciously.

“Why?”

“Because it wasn't there when you came in.”

Pip thought about this.

“I see.”

He walked back towards the door.

“Don't move.”

“I wasn't moving.”

“You were.”

“I was walking.”

“That's moving.”

Pip stopped.

Mara looked at the chair.

It had changed.

It was now a table.

Pip looked too.

“That was a chair.”

“Yes.”

“Now it's a table.”

“Yes.”

“Why?”

“I don't know.”

Pip walked around it.

“Perhaps it's both.”

Mara touched the tabletop.

It was definitely a table.

She pulled out the drawer.

Inside was a small wooden chair.

Pip stared.

Mara stared.

The chair inside the table was exactly like the chair that had been there before.

Pip opened the chair.

Inside was a tiny table.

He closed it quickly.

“No.”

“What?”

“I think we're better off not opening things.”

Mara agreed.

They stood quietly for a moment.

Then the room changed.

Not dramatically.

There was no flash of light.

No thunder.

Nothing exploded.

The walls simply became different.

The window moved to the opposite wall.

The door moved beside it.

The table became a chair.

The floor became blue.

The ceiling became the floor.

Pip sat down.

Unfortunately, he sat on the ceiling.

Mara looked up at him.

“Are you all right?”

“Yes.”

“Good.”

“Could you come up here?”

“I think I'm on the floor.”

“I'm on the floor too.”

They both looked around.

Mara suddenly wasn't sure which way was up.

She took one careful step.

The room turned.

Not physically.

It simply became a different arrangement.

Now the door was behind them.

The window was above them.

The chair was on the wall.

And Pip was standing normally.

“I preferred the other one,” he said.

“Which other one?”

“The one we were just in.”

“But this is the same room.”

“No, it isn't.”

“It is.”

Pip shook his head.

“It has the same things.”

Mara looked around.

He was right.

The chair was there.

The table was there.

The window was there.

The door was there.

Even the little crack in the floor was there.

But they were in different places.

Mara walked towards the window.

It was now a door.

She opened it.

Behind it was another room.

In the room was another Mara.

She was standing beside another Pip.

They were looking at another window.

Mara shut the door.

Pip was quiet.

“Was that us?”

“I don't know.”

“Were they looking at us?”

“I think so.”

“Then perhaps we're looking at them.”

Mara opened the door again.

The room was empty.

No Mara.

No Pip.

Just the chair.

Except now it was a table.

Pip sighed.

“I think the room is changing its mind.”

Mara considered this.

“Perhaps it isn't changing its mind.”

“What is it doing?”

“Changing its arrangement.”

Pip looked at the furniture.

“But why?”

“Maybe it doesn't like having only one arrangement.”

Pip frowned.

“Do rooms have opinions?”

“I don't know.”

“Then how do you know it doesn't like it?”

“I don't.”

They walked further into the room.

Every few steps, something changed.

The chair became a table.

The table became a door.

The door became a window.

The window became a mirror.

The mirror became a wall.

The wall became a door.

Nothing disappeared.

Everything was still there.

It was simply somewhere else.

Mara began to notice something.

“Pip.”

“Yes?”

“Look.”

She pointed to the corners.

The room had four corners.

Then five.

Then four again.

Then six.

Then three.

But somehow, each time, the room still looked perfectly ordinary.

Pip counted carefully.

“Four.”

“Now?”

“Five.”

“Now?”

“Four.”

Mara laughed.

Pip didn't.

“This is serious.”

“I know.”

“Then why are you laughing?”

“Because I don't think the room knows how many corners it has.”

Pip considered this.

“Perhaps we should tell it.”

“How?”

“Four.”

The room changed.

“Four.”

Nothing happened.

“Four!”

The walls shifted.

The window moved.

The table became a chair.

Pip grinned.

“It listened.”

Mara shook her head.

“Try something else.”

Pip thought.

“Five.”

The room changed again.

“Three.”

Again.

“Six.”

Again.

Mara laughed.

“You're making it worse.”

“I'm experimenting.”

“You're arguing with a room.”

“It's answering.”

Mara looked around.

He was right.

The room was responding.

Not with words.

With arrangements.

They tried numbers.

They tried shapes.

They tried colours.

They tried names.

Whenever they said something, the room rearranged itself.

Finally Mara said:

“Pip.”

The room stopped.

Pip looked at her.

“What?”

She pointed.

Everything had become symmetrical.

The chair stood opposite the table.

The window opposite the door.

The four walls were identical.

Even the crack in the floor had become four cracks, one in each corner.

“It copied itself,” said Pip.

Mara walked to the middle of the room.

There was a small glass object on the floor.

She picked it up.

It was a tube.

Inside were tiny pieces of coloured glass.

She held it to her eye.

The room changed.

Not the real room.

The room inside the glass.

The chair became three chairs.

The table became six tables.

The window became twelve windows.

Every movement produced another arrangement.

Mara turned the tube.

The whole world changed.

She turned it again.

Another world.

Pip looked through the other end.

“What is it?”

“I don't know.”

“Can I have a turn?”

She handed it to him.

Pip looked.

He turned the tube once.

Then twice.

Then stopped.

“What?”

Mara asked.

Pip handed it back.

“There are two of you.”

Mara looked through.

There were.

Two Maras stood in the room.

One was holding the glass tube.

The other was standing beside the door.

Mara turned around.

There was no one there.

She looked through the tube again.

The second Mara was still there.

And now the second Mara was looking directly at her.

She raised one hand.

Mara raised hers.

The other Mara smiled.

Then she pointed behind Mara.

Mara turned.

There was a door.

It had not been there before.

Above it was a small brass sign.

Mara walked closer.

The sign said:

THE ROOM BEYOND THIS DOOR IS THE ROOM YOU ARE IN.

Pip read it.

“Oh.”

“What?”

“I think we've found the way out.”

Mara looked at the door.

“How?”

Pip opened it.

Behind it was the room they were standing in.

The same chair.

The same table.

The same window.

The same Pip.

The same Mara.

Except the other Mara was holding the glass tube.

Mara looked at her.

The other Mara looked at Mara.

Neither moved.

Then, very slowly, the other Mara lifted the tube.

She turned it once.

The room changed.

Mara blinked.

The door was gone.

The table was gone.

The chair was gone.

Pip was gone.

She was standing alone in a long corridor.

At the far end was a mirror.

Mara walked towards it.

In the mirror, she could see Pip.

He was standing in a room.

He was holding the glass tube.

And beside him was a girl who looked exactly like Mara.

Pip saw her.

He smiled.

Then he said something.

Mara couldn't hear him.

She stepped closer to the mirror.

Pip raised his hand.

He knocked.

Three times.

Knock.

Knock.

Knock.

Mara raised her own hand.

And before she could knock back, the mirror became a door.

Chapter 2. The House with Two Insides

The green door opened very slowly.

Mara and Pip stood perfectly still.

Beyond it was not the corridor.

It was a garden.

There was a crooked path through the grass, a stone fountain, three apple trees and a house at the far end.

The house was blue.

Or perhaps it was grey.

It depended, Mara thought, on which way she looked at it.

“That's not the library,” said Pip.

“No.”

“Good.”

“Why is that good?”

“I was worried we'd gone back.”

Mara stepped through the door.

The grass was damp.

Pip followed.

The green door swung shut behind them.

There was no wall.

There was no library.

There was only the garden.

And the house.

Mara walked towards it.

As she got closer, she noticed something peculiar.

The house had two front doors.

They were identical.

Both were painted blue.

Both had brass knockers.

Both had little round windows.

Between them was a brass plaque.

Mara leaned closer.

It said:

THIS IS THE FRONT DOOR.

Pip read it.

Then he looked at the other door.

“That one says the same thing.”

“It does.”

“Then one of them is lying.”

“Which one?”

Pip thought.

“The one we're not standing in front of.”

Mara laughed.

“That's not how lying works.”

“How do you know?”

“I don't.”

Pip nodded thoughtfully.

“Then perhaps it is.”

Mara opened the left-hand door.

Inside was a hallway.

A long hallway.

There was a staircase, a coat stand, a grandfather clock and several pictures.

Mara stepped in.

Pip followed.

The door closed behind them.

“Seems ordinary,” he said.

Mara looked at the staircase.

There were seven steps.

She counted them again.

Seven.

“That's odd.”

“What?”

“The house is very large.”

“Yes.”

“But there are only seven steps.”

Pip shrugged.

“Perhaps the upstairs is small.”

Mara climbed them.

At the top was another hallway.

It looked exactly like the one below.

Same carpet.

Same pictures.

Same clock.

Same coat stand.

Same staircase.

Mara turned around.

Pip was still standing at the bottom.

“Come on.”

“I'm coming.”

He climbed the stairs.

When he reached the top, Mara looked back down.

There was no hallway below.

There was a second staircase.

It went down to another landing.

Pip stared.

“That's not the same staircase.”

“It was.”

“How do you know?”

“I climbed it.”

“That doesn't prove anything.”

“What would prove it?”

Pip considered this.

“Climbing it twice.”

Mara walked down the second staircase.

Pip followed.

At the bottom was another hallway.

Same carpet.

Same pictures.

Same clock.

Same coat stand.

And another staircase.

Pip sat down.

“I think the house is repeating.”

Mara sat beside him.

“Perhaps.”

“That's impossible.”

“Yes.”

“Shouldn't you sound more worried?”

“I am.”

“You don't sound worried.”

“I've decided to worry quietly.”

Pip looked at the nearest picture.

It showed a garden.

In the garden was a blue house.

In front of the house were two children.

One was Mara.

The other was Pip.

Pip stood up.

“I don't like that.”

Mara looked at the picture.

The children in it were standing in front of the other blue door.

The right-hand door.

“That's us.”

“Yes.”

“But we haven't been there.”

“No.”

“Not yet.”

Mara looked at him.

“Why did you say yet?”

Pip looked uncomfortable.

“I don't know.”

The grandfather clock began to tick.

They both turned towards it.

It had no hands.

Yet it was ticking.

Mara walked over.

On the clock face was a little brass door.

She opened it.

Inside was a tiny hallway.

At the end of the hallway was a tiny blue house.

Pip came to look.

“That's the house.”

“Yes.”

“It's inside the clock.”

“Yes.”

“Then where are we?”

Mara thought about this.

“Inside the house.”

Pip nodded.

“That's what I was afraid of.”

A sound came from somewhere above them.

Footsteps.

Slow footsteps.

Someone was walking along the floor upstairs.

Mara looked at the staircase.

“Perhaps there's someone else here.”

Pip shook his head.

“I don't think so.”

“How do you know?”

“Because they're walking like they know where they're going.”

The footsteps stopped.

Then came three knocks.

Knock.

Knock.

Knock.

Mara froze.

“That sounds familiar.”

“Yes.”

“It's the knocking from the wall.”

Pip looked at her.

“Then perhaps the wall is here too.”

Mara suddenly had an idea.

“Come on.”

They ran.

Up the staircase.

Down the hallway.

Through a door.

Up another staircase.

Past the clock.

Through another door.

Down a narrow passage.

At last they reached a room with two windows.

Through one window was the garden.

Through the other was the library.

Mara pressed her face against the glass.

The old library wall was outside.

There was the crack shaped like a duck.

There was the pavement.

There was the street.

And there, standing on the pavement, was Mara.

Mara stepped backwards.

Pip stared through the window.

“That's you.”

“Yes.”

“And that's me.”

“Yes.”

They were watching themselves.

Outside, the other Mara looked up.

She saw them.

She raised a hand.

Mara raised hers.

The other Pip waved his biscuit.

Pip looked down at his own hand.

He was not holding a biscuit.

“That is extremely unsettling,” he said.

Outside, the other Mara pointed towards the library wall.

Then she knocked on the glass.

Three times.

Knock.

Knock.

Knock.

Mara answered.

Three times.

Knock.

Knock.

Knock.

The other Mara smiled.

Then she stepped away from the window.

Mara watched her walk towards the green door.

“No,” she whispered.

The other Mara opened it.

The door disappeared.

The garden vanished.

The window became an ordinary window.

Pip stared.

“What happened?”

Mara didn't answer.

She was looking at the other window.

The one that showed the garden.

Except now the garden was empty.

The blue house stood at the far end.

There were two houses.

One stood behind the other.

Mara rubbed her eyes.

The nearer house had two front doors.

The farther house had two front doors.

And through the window of the farther house she could see two children looking back at her.

One of them was holding a biscuit.

Pip slowly took a biscuit from his pocket.

He looked at it.

Then at the window.

“I think,” he said, “I'm beginning to understand.”

“What?”

“The house doesn't have two insides.”

Mara looked at him.

“What does it have?”

Pip pointed at the two houses.

“Two outsides.”

Mara stared.

Then the grandfather clock struck thirteen.

The whole house gave a small, polite shudder.

And somewhere below them, a door opened.

Mara and Pip looked at each other.

“Which way?” asked Pip.

Mara looked at the two staircases.

For the first time, she noticed something she hadn't noticed before.

One staircase had eight steps.

The other had seven.

She smiled.

“Let's take the one that wasn't there before.”

They ran downstairs.

Behind them, the house quietly rearranged itself.

Chapter 1. The Door That Wasn't There

On Tuesday morning, Mara found a door where there had not been a door before.

She knew this because she had walked past the wall every morning for nearly seven years.

It was a very ordinary wall.

It belonged to the old library at the end of Bellweather Street, which had been closed for repairs for as long as anyone could remember. The wall was made of pale bricks, except for three darker ones near the bottom. There was a crack shaped rather like a duck.

Mara had always liked the crack.

She had never liked doors much.

Doors were too definite.

This door was different.

It was small and green, with a brass handle and a little round window at eye level.

Mara stopped.

She looked behind her.

The street was exactly as it ought to be.

A bus went past.

A man walked a dog.

The dog walked the man.

A woman in a yellow coat dropped an orange and did not notice.

Nothing seemed particularly unusual.

Mara turned back to the wall.

The door was still there.

She touched it.

“Don't,” said Pip.

Mara jumped.

Pip was sitting on the library steps, eating a biscuit.

“What are you doing here?”

“Eating a biscuit.”

“I can see that.”

“Then why did you ask?”

Mara considered this.

“Why are you sitting on the library steps?”

“Because they're steps.”

Pip was very good at answers that were correct and entirely unhelpful.

Mara pointed at the wall.

“There wasn't a door there yesterday.”

Pip looked at it.

“There isn't one now.”

Mara stared at him.

“There is.”

“No.”

“Yes.”

Pip took another bite of his biscuit.

“You're pointing at a wall.”

“I am pointing at a door.”

“You're pointing at a wall with a door on it.”

“Yes.”

“So it's a wall.”

“And a door.”

“Then what is it?”

Mara thought about this.

“A wall with a door in it.”

Pip nodded.

“Exactly.”

There was a pause.

“That doesn't help,” said Mara.

“It wasn't intended to.”

Mara turned the brass handle.

The door opened.

Behind it was a narrow corridor.

Pip stopped chewing.

“That wasn't there yesterday either.”

“I know.”

“How do you know?”

“Because you just said there wasn't a door.”

“I said there wasn't a corridor.”

“You said there wasn't a door.”

“There wasn't.”

“There is now.”

Pip looked suspiciously at the doorway.

“How do we know it isn't the sort of door that leads nowhere?”

Mara looked inside.

The corridor had a carpet.

There were pictures on the walls.

At the far end was another door.

It was blue.

“Doors usually lead somewhere,” she said.

“That's what makes them dangerous.”

Mara stepped through.

Pip followed.

The green door clicked shut behind them.

They both turned.

The door was still there.

“Good,” said Pip.

“What?”

“We can get out.”

Mara opened it.

On the other side was the library wall.

Not the street.

The wall.

She shut the door.

Opened it again.

The wall.

She looked at Pip.

Pip looked at her.

“That's not right,” he said.

“No.”

They opened the door together.

The wall remained.

“Perhaps,” said Pip carefully, “we have gone somewhere else.”

“We're standing in the corridor.”

“Yes.”

“And the door is in the wall.”

“Yes.”

“So we're still in the library.”

“Possibly.”

Mara looked at the pictures.

There were twelve of them.

Each showed the same little green door.

The first picture showed the door in a wall.

The second showed the door in a corridor.

The third showed the door standing by itself in a field.

The fourth showed the door underwater.

The fifth showed the door in the middle of a bedroom.

The sixth showed the door on the ceiling.

Mara moved closer.

The seventh picture was blank.

The eighth showed a door with no wall.

The ninth showed two doors.

The tenth showed a door reflected in a mirror.

The eleventh showed a little green door with a brass handle.

The twelfth showed—

Mara stopped.

“Pip.”

“What?”

“That's us.”

In the twelfth picture, two children stood in a corridor.

One was a girl with dark hair.

The other was a boy holding a biscuit.

Pip leaned closer.

“They've drawn me badly.”

“You're holding a biscuit.”

“I always hold a biscuit.”

Mara looked at the picture again.

The girl in it was looking at the painting.

The boy was looking at the girl.

But neither of them was looking at the door.

Mara turned around.

At the end of the corridor stood the blue door.

She walked towards it.

Pip followed.

“Perhaps we should leave.”

“We haven't got anywhere yet.”

“That's usually when leaving is easiest.”

Mara reached the blue door.

There was a brass plate.

It said:

PLEASE DO NOT OPEN THIS DOOR UNLESS YOU HAVE ALREADY OPENED IT.

Pip read it twice.

“I don't like it.”

“Why?”

“Because I've never opened it.”

Mara put her hand on the handle.

“You haven't.”

She paused.

“But I have.”

“When?”

Mara looked back along the corridor.

At the green door.

At the twelve pictures.

At the twelfth picture.

At the little green door.

And suddenly she had the strangest feeling that she had forgotten something.

Not something from yesterday.

Not something from last week.

Something that had happened after this moment.

She looked at the blue door again.

“Pip?”

“Yes?”

“Have we been here before?”

“No.”

“How do you know?”

“Because I would remember.”

Mara smiled.

“That isn't what I asked.”

Pip frowned.

Then he looked at the sign.

Then at Mara.

Then at the handle.

“Perhaps,” he said, “we should find out.”

Mara opened the door.

And on the other side was the library wall.

Except this time, there was no green door in it.

There was only a little crack shaped rather like a duck.

Mara stared.

Pip stared.

Then, from somewhere behind the wall, came a quiet knock.

Three times.

Knock.

Knock.

Knock.

Mara looked at Pip.

Pip looked at Mara.

“Did you hear that?”

“Yes.”

“Good.”

“Why is that good?”

“Because if I hadn't heard it too, I'd have had to pretend I hadn't.”

The knocking came again.

Three times.

And then a voice, very faintly, from the other side of the wall:

“Are you coming?”

Mara reached for the wall.

Pip grabbed her sleeve.

“Wait.”

“What?”

“How do we know which side we're on?”

Mara looked at the wall.

She looked at the corridor.

She looked at the green door.

Then she looked at the little crack shaped like a duck.

She wasn't sure anymore.

So she did the only sensible thing.

She knocked back.

Three times.

Knock.

Knock.

Knock.

Something on the other side knocked exactly three times in reply.

And somewhere, very far away—or perhaps very near—the green door opened.