Chapter OneOne In the beginning (and ever since her mother''s car crash when she was just a year old), Abi had lived with her father, Theo. Granny Grace, Theo''s mother, lived with them too. Granny Grace had been planning to take a break from her work teaching and visit Jamaica when the accident happened, but she never did. She said she''d rather look after Abigail instead. At the same time (and ever since their father had decided he''d rather have no children and live in New Zealand), Max and Louis had lived with their mother, Polly. Abi and Theo and Granny Grace lived happily in a small sunny flat in one part of the city. Polly and Max and Louis lived just as happily in a small terraced house in another. These two sets of people didn''t know each other.

This all changed one afternoon when Max and his best friend, Danny, were in a fixing things mood. They took apart their skateboards, cleaned out the gunk from the wheels and the axles, put them together again, and sprayed all the moving parts with expensive lubricating spray borrowed without asking from one of Danny''s big brothers. Then they went outside to try them, and Louis went with them to watch. "They should go much faster," said Danny, and he dropped his board onto the pavement and gave a mighty launching-off kick, and the front wheels could not have been fixed back on properly, because Danny went hurtling down onto concrete paving slabs just as Max got into action. Max''s wheels stayed on and his board was now spectacularly fast. Max mowed down Louis and went straight over Danny before he too hit the ground. Then Polly, hearing the roars, came rushing out of the house, and when she saw the boys all bleeding and wailing and blocking the pavement, she unhesitatingly took them to the hospital in the old blue car she had painted herself, with the tiger cushions in the back. Louis had two skinned knees and a lump on his head like a great dark-purple plum.

Danny and Max had a broken arm each and various lesser injuries, but the chief thing that happened at the hospital was that Polly met Theo. Theo was the nurse in the Accident and Emergency Department who oversaw the management of the skateboarding calamity. He did it with such admirable cheerfulness and calm that very soon the injured ones stopped feeling like woeful victims and became instead very pleased with themselves, fine adventurers and heroes all. "Thank you so much for popping in," Theo said at last, six or seven hours later and pitch-dark outside, when all the bandages, slings, plasters, and stickers saying how brave people had been were finally in place. "It''s been lovely," said Polly. "I''ve enjoyed every moment." Then Theo''s smiling eyes gazed into Polly''s sparkling ones, gazed and gazed and gazed. "Do you believe in love at first sight?" asked Theo (unprofessionally).

"Yes," said Polly. "I do." That was how the two families met, and a few months later, when Abi was eleven, Theo and Polly married each other. "Oh my!" said Granny Grace. Not at the start, though. When she''d first met Polly, she''d been awful about the thought of a stepmother coming into Abi''s life. But by the time of the wedding, things were different. "A little bird has told me your Polly is a wonder," said Granny Grace.

Granny Grace''s network of little birds stretched all around London and even back into the past. They knew everything and were infallible. She trusted them completely, so she''d finally come round. "Oh my!" said Granny Grace after much communication with many little birds. "Can it be that my work here is done at last?" Never once, throughout the whole ten years that Granny Grace had lived with them, had she mentioned that long-postponed trip back to Jamaica. Suddenly she couldn''t hide her joy. "Did you know she wanted to write a cookbook with her sister?" demanded Abi of Theo. "That she owned quarter shares in a beach café and they are going to rebuild and relaunch with a whole new menu? Did you know she had so many nieces and nephews and that they all have children she''s never seen? Did you know she inherited a cat that lives with her friend? Or how much she has missed Jamaican flowers? She''ll never come back!" lamented Abi.

"Then we will visit her," said Theo. "And meet the cat and eat at the café and admire all the babies." "Just me and you?" "And Polly and the boys. They will love it. Don''t gaze up at the sky like that!" "Well!" said Abi. "Abi, Abi," said Theo gently. "You know, and I know, that Granny Grace deserves every happy moment." The next great change was that Theo and Abi moved into Polly and Louis and Max''s house.

Then there were difficulties. The way that thirteen-year-old Max suddenly found himself sharing a bedroom with six-year-old Louis, which meant he entirely stopped inviting friends home and spent endless hours at their houses instead. The eye-rolling awfulness for Max and Abi (Louis didn''t care) when Theo and Polly, for instance, held hands. Also Abi''s problem with Louis, who had assumed little-brother rights much too fast. Louis continually forgot that his old room was now Abi''s. He wandered in unannounced whether Abi was there or not, and he always seemed surprised to find himself unwelcome. "I''m getting dressed !" Abi complained one morning. "I know," said Louis, unmoved.

He was a fragile, bony, pale little boy with sticky hands always eager to reach and grab, or hug or hold. Baths and showers made little impact on the permanent grubbiness of Louis. His clothes never fit. His mouth never quite closed. His tattered blond curls dangled over his eyes and as often as not housed nits. Nits! Abi had caught them, and the treatment had been terrible, and afterward, her hair! Polly had helped, and Theo had helped, but the person who could have helped most was thousands of miles away: Granny Grace, whose deft, quick fingers had for ten years twisted Abi''s hair into woven braids and topknots with no apparent effort at all. "You need a professional," Granny Grace had dictated from Jamaica, and commanded a trip to a hairdresser. That had solved the problem, and Polly had remarked, "Next time we''ll know what to do.

" "There won''t be a next time," Abi vowed, and she had had to become very stern with Louis. "Knock on the bedroom door and then wait!" "Put my bag down NOW!" "No, I won''t look at your horrible knee! And you shouldn''t kiss people with your mouth full!" On top of Abi''s Louis problem, there was her intruder-feeling problem. "A new, ready-made family for us, Abi," said Theo. "I always worried that you were an only child." I still am an only child! protested Abi, although silently, in her head. (She found herself doing a lot of silent protesting in her head these days.) But now I''m an only child in someone else''s house! Abi had felt like that from the start, in the kitchen with its cupboards full of other people''s food and mugs and plates, and in the living room, where she never knew where to sit. Even more, in her new tiny bedroom, where she could not even escape with books without feeling guilty, because she was the only one with a room of her own.

"Thank you," said Abi stiffly when she first heard that Max and Louis were going to double up and share. "Mum made us," said Max grimly. "I suppose we''ll get used to it," he added, sounding like he didn''t believe it for a moment. Abi didn''t believe it either. Great quarrels came erupting from behind that bedroom door. Louis, although utterly messy in his appearance, was obsessively tidy in his room. Max was the opposite. Max lived in a great heap of Max junk.

He and Louis stuck a line of tape across their bedroom floor, dividing the enormous Max mess from the extreme neatness of Louis. Nothing could stop Louis seeing over the line, though, just as nothing could save Max from having to listen to Louis droning himself to sleep at night, like an out-of-tune mosquito. The rocking horse was yet another problem. He was no ordinary rocking horse; he was one of the full-size, galloping sort, capable of catapulting a child some distance over his head when going at full speed and foot crushing and shin rapping on an almost daily basis. Before Abi, he had belonged to Abi''s mother. Abi, who had parted with so much: her bedroom, her home, Granny Grace, and nearly all her past life, had become silent when it came to what to do with Rocky. Not stubbornly silent, just plain miserable silent. And in the end Rocky had moved too.

Louis had been delighted. "Rocky isn''t a toy; he''s an antique!" Abi protested, finding his saddle smeared all over with chocolate. "What have you pushed in his mouth?" "Banana for his breakfast," said Louis unrepentantly. "Can I glue a horn on his head so that then he can be a unicorn?" "No you CANNOT!" said Abi. "Leave him alone! Why do I have to share everything ?" "You don''t share anything!" said astonished Louis, and Abi, equally astonished, had only just managed not to growl, What about my dad? There was no space for Rocky in Abi''s new tiny bedroom, so he lived a wandering life until he ended up in the hall, squashed against the coats, taking people by surprise (and once knocking out a tooth). After the tooth problem (which had happened with one of Louis''s friends), Theo said, "Abi, don''t you think.?" Polly rescued her. Polly said it was only a first tooth, which would have had to come.