"I'm an explorer," said Coraline out loud, but her words sounded muffled and dead on the misty air. She had made it out of the cellar, hadn't she?

And she had. But if there was one thing that Coraline was certain of, it was that this flat would be worse.

Coraline walked up the steps outside the building to the topmost flat where, in her world, the crazy old man upstairs lived. She had gone up there once with her real mother, when her mother was collecting for charity. They had stood in the open doorway, waiting for the crazy old man with the big moustache to find the envelope that Coraline's mother had left, and the flat had smelled of strange foods and pipe tobacco and odd, sharp, cheesy-smelling things which Coraline could not name. She had not wanted to go any further inside than that.

She reached the top of the steps. The topmost flat had once been the attic of the house, but that was long ago.

We have eyes and we have nerveses.

She knocked on the green-painted door. It swung open, and she walked in.

When we rise from underneath, whispered a dozen or more tiny voices, in that dark flat with the roof so low where it met the walls that Coraline could almost reach up and touch it.

We have tails, we have teeth.

"Little girl," said a rustling voice in a far room.

you'll all get what you deserveses.

Red eyes stared at her. Little pink feet scurried away as she came close. Darker shadows slipped through the shadows at the edges of things.

There was nothing here that frightened her. These things -- even the thing in the cellar -- were illusions, things made by the other mother in a ghastly parody of the real people and real things on the other end of the corridor. She couldn't truly make anything, decided Coraline. She could only twist and copy and distort things that already existed.

"Yes," said Coraline. I'm not frightened, she told herself, and as she thought it she knew that it was true.

It smelt much worse in here than in the real crazy old man upstairs's flat. That smelled of food (unpleasant food, to Coraline's mind, but she knew that was a matter of taste: she did not like spices, herbs or exotic things). This place smelled as if all the exotic foods in the world had been left out to go rotten.

"Come here, little girl. I know what you want, little girl." It was a rustling voice, scratchy and dry. It made Coraline think of some kind of enormous dead insect. Which was silly, she knew. How could a dead thing, especially a dead insect, have a voice?

Then the voice came again, and her train of thought was gone.

And once she had asked herself the question, she began to understand the answer.

And then Coraline found herself wondering why the other mother would have placed a snowglobe on the drawing-room mantelpiece; a place that, in her world, was quite bare.

She walked through several rooms with low, slanting ceilings until she came to the final room. It was a bedroom, and the other crazy old man upstairs sat at the far end of the room, in the near-darkness, bundled up in his coat and hat.

As Coraline entered he began to talk. "Nothing's changed, little girl," he said, his voice sounding like the noise dry leaves make as they rustle across a pavement. "And what if you do everything you swore you would? What then? Nothing's changed. You'll go home. You'll be bored. You'll be ignored. No one will listen to you, not really listen to you. You're too clever and too quiet for them to understand. They don't even get your name right."

"And will there be grey, wet days where I just don't know what to do and there's nothing to read or to watch and nowhere to go and the day drags on forever?" asked Coraline.

"Stay here with us," said the voice from the figure at the end of the room. "We will listen to you and play with you and laugh with you. Your other mother will build whole worlds for you to explore, and tear them down every night when you are done. Every day will be better and brighter than the one that went before. Remember the toybox? How much better would a world be built just like that, and all for you?"

"And could I have Day-glo green gloves to wear, and yellow Wellington boots in the shape of frogs?" asked Coraline.

"Every meal will be a thing of joy," whispered the voice from under the old man's hat. "Nothing will pass your lips that does not entirely delight you."

From the shadows, the man said, "Never."

"And will there be awful meals, with food made from recipes, with garlic and tarragon and broad beans in?" asked Coraline.

Coraline sighed. "You really don't understand, do you?" she said. "I don't want whatever I want. Nobody does. Not really. What kind of fun would it be if I just got everything I ever wanted? Just like that, and it didn't mean anything. What then?"

"Frogs, ducks, rhinos, octopuses -- whatever you desire. The world will be built new for you every morning. If you stay here, you can have whatever you want."

"I don't understand," said the whispery voice.

"Of course you don't understand," she said, raising the stone with the hole in it to her eye. "You're just a bad copy she made of the crazy old man upstairs."

"Not even that any more," said the dead, whispery voice.

There was a glow coming from the raincoat of the man, at about chest height. Through the hole in the stone the glow twinkled and shone blue-white as any star. She wished she had a stick or something to poke him with; she had no wish to get any closer to the shadowy man at the end of the room.

Coraline took a step closer to the man, and he fell apart. Black rats leapt from the sleeves and from under the coat and hat, a score or more of them, red eyes shining in the dark. They chittered and they fled. The coat fluttered and fell heavily to the floor. The hat rolled into one corner of the room.

The other rats watched her from the corners of the room as she ran after it.

Now, rats can run faster than people, especially over short distances. But a large black rat holding a marble in its two front paws is no match for a determined girl (even if she is small for her age) moving at a run. Smaller black rats ran back and forth across her path, trying to distract her, but she ignored them all, keeping her eyes fixed on the one with the marble, who was heading straight out of the flat, towards the front door.

They reached the steps on the outside of the building.

Coraline had time to observe that the house itself was continuing to change, becoming less distinct, and flattening out, even as she raced down the stairs. It reminded her of a photograph of a house now, not the thing itself. Then she was simply racing pell-mell down the steps in pursuit of the rat, with no room in her mind for anything else, certain she was gaining on it. She was running fast -- too fast, she discovered, as she came to the bottom of one flight of steps, and her foot skidded and twisted and she went crashing on to the concrete landing.

Coraline reached out her hand and pulled the coat open. It was empty, although it was greasy to the touch. There was no sign of the final glass marble in it. She scanned the room, squinting through the hole in the stone, and caught sight of something that twinkled and burned like a star, at floor level, by the doorway. It was being carried in the forepaws of the largest black rat. As she looked, it slipped away.

Her left knee was scraped and skinned, and the palm of one hand she had thrown out to stop herself was a mess of scraped skin and grit. It hurt a little, and it would, she knew, soon hurt much more. She picked the grit out of the palm and climbed to her feet and, as fast as she could, knowing that she had lost and it was already too late, she went down the final set of steps to ground level.

She looked around for the rat, but it was gone, and the marble with it.

Her hand stung where the skin had been scraped, and there was blood trickling down her ripped pyjama-leg from her knee. It was as bad as the summer that her mother had taken the training wheels off Coraline's bicycle; but then, back then, in with all the cuts and scrapes (her knees had had scabs on top of scabs) she had a feeling of achievement. She was learning something, doing something she had not known how to do before. Now she felt nothing but cold loss. She had failed the ghost-children. She had failed her parents. She had failed herself, failed everything.

She closed her eyes and wished that the earth would swallow her up.

There was a cough.

She opened her eyes, and saw the rat. It was lying on the brick path at the bottom of the steps, with a surprised look on its face -- which was now several centimetres away from the rest of it. Its whiskers were stiff, its eyes were wide open, its teeth visible and yellow and sharp. A collar of wet blood glistened at its neck.

Beside the decapitated rat, a smug expression on its face, was the black cat. It rested one paw on the grey glass marble.

"I think I once mentioned," said the cat, "that I don't like rats at the best of times. It looked like you needed this one, however. I hope you don't mind my getting involved."

"I think," said Coraline, trying to catch her breath, "I think you may… have said… something of the sort."

The cat lifted its paw from the marble, which rolled towards Coraline. She picked it up. In her mind, a final voice whispered to her, urgently. "She has lied to you. She will never give you up, now she has you. She will no more give any of us up than she can change her nature."

And the mantelpiece in the drawing room back home was quite empty. But, knowing that, she knew something else, as well.

"The other mother. She plans to break her promise. She won't let us go," said Coraline.

"I wouldn't put it past her," admitted the cat. "Like I said, there's no guarantee she'll play fair." And then he raised his head. "Hello É did you see that?"

The hairs on the back of Coraline's neck prickled, and Coraline knew that the girl's voice told the truth. She put the marble in her dressing-gown pocket with the others.

She had all three marbles, now.

All she needed to do was to find her parents.

"What?"

"Look behind you," said the cat.

And, Coraline realised, that was easy. She knew exactly where her parents were. If she had stopped to think, she might have known where they were all along. The other mother could not create. She could only transform, and twist, and change.

The house had flattened out even more. It no longer looked like a photograph -- more like a drawing, a crude, charcoal scribble of a house drawn on grey paper.

The cat's fur was on end, and its tail was bristling like a chimney-sweep's brush.

"What's wrong?" asked Coraline.

"Whatever's happening," said Coraline, "thank you for helping with the rat. I suppose I'm almost there, aren't I? So you go off into the mist or wherever you go, and I'll, well, I hope I get to see you at home. If she lets me go home."

"They've gone," said the cat. "They aren't there any more. The ways in and out of this place. They just went flat."

"Is that bad?"

"You'll be fine," said Coraline. "Everything's going to be fine. I'll take you home."

The cat lowered its tail, swishing it from side to side angrily. It made a low growling noise in the back of its throat. It walked in a circle, until it was facing away from Coraline, and then it began to walk backwards, stiffly, one step at a time, until it was pushing up against Coraline's leg. She put down a hand to stroke it, and could feel how hard its heart was beating. It was trembling, like a dead leaf in a storm.

The cat said nothing.

The cat was heavy, but not too heavy to carry. It licked at the palm of her hand, where the blood from the scrape was welling up.

"If the only way out is past her," said Coraline, "then that's the way we're going to go." She went back to the cat, bent down and picked it up. The cat did not resist. It simply trembled. She supported its bottom with one hand and rested its front legs on her shoulder.

"Come on, cat," said Coraline. She took a step back towards the steps, but the cat stayed where it was, looking miserable and, oddly, much smaller.

She got to her front door -- now just a small-child's scrawl of a door -- and she pushed her hand against it, half-expecting that her hand would rip through it, revealing nothing behind it but blackness and a scattering of stars.

But the door swung open, and Coraline went through.

Coraline walked up the steps one at a time, heading back to her own flat. She was aware of the marbles clicking in her pocket, aware of the stone with the hole in it, aware of the cat pressing itself against her.