April knows she was abandoned in a rubbish bin as a newborn baby, fourteen years ago. Now she's happily settled with her foster mother, Marion – but there's a part of April that's desperate to know where she really came from, and who she really is. If only she could remember her real mother – or even find her ...

When my parents split up they didn't know what to do with me ... My family always lived at Mulberry Cottage. Mum, Dad, me – and Radish, my Sylvanian rabbit. But now Mum lives with Bill the Baboon and his three kids. Dad lives with Carrie and her twins. And where do I live? I live out of a suitcase. One week with Mum's new family, one week with Dad's. It's as easy as A B C. That's what everyone says. But all I want is to go home – back to Mulberry Cottage...

Shy, mild Mandy has been bullied at school for as long as she can remember. That's why she is delighted when cheeky, daring, full-of-fun Tanya picks her as a friend.Mum isn't happy – she thinks Tanya's a BAD GIRL and a bad influence on her daughter. But Mandy loves spending time with her brilliant new friend, and is sure Tanya can only get her out of trouble, not into it ... or could she?

Ten-year-old Tracy was taken into care a while ago, and now she lives in a Children's Home. She doesn't know exactly where her mum lives, but she used to have long, pretend phone calls with her. Tracy's had two foster families, but things just didn't work. She allows us to share her hopes for the future in this touching and often very funny tale.

Katy Carr is a lively, daredevil oldest sister in a big family. She loves messing around outdoors, climbing on the garage roof or up a tree, cycling, skateboarding, swinging.... But her life changes in dramatic and unexpected ways after a serious accident. Inspired by the classic novel What Katy Did, Jacqueline Wilson creates an irresistible 21st-century heroine. Fans of Hetty Feather and Tracy Beaker will fall in love with Katy and her family too.

Em adores her funny, glamorous dad – who cares if he's not her real father? He's wonderful to her, and to her little brother Maxie and sister Vita. True to form at Christmas, Dad gives them fantastic presents, including a real emerald ring for his little Princess Em.Unfortunately he's got another surprise in store – he's leaving them. Will Dad's well-meaning but chaotic attempts to keep seeing Em and the other children help the family come to terms with this new crisis?

When Stella is dumped at summer camp while her mum goes off on a posh honeymoon, things start badly. In the first few minutes she's mistaken for a boy and put in a room with snobby Louise and nasty Karen. Then she finds out she'll have to take dreaded swimming lessons, the one thing mum promised she wouldn't have to do. Can things get any worse?

Is anything bothering you? Problems in class or at home? Don't know where to turn for help? Log on to the Worry Website! Type in your worry and wait for the good advice to flow in. At least that's the plan when Mr Speed sets up his super-cool new Worry Website for the class. Holly, Greg, Natasha and the rest feel that they've got shed loads of worries but, as they find out, sometimes the best advice comes from the most unexpected place.

Ruby and Garnet are ten-year-old twins. They're identical, and they do everything together, especially since their mother died three years earlier – but they couldn't be more different. Bossy, bouncy, funny Ruby loves to take charge, and is desperate to be a famous actress, while quiet, sensitive, academic Garnet loves nothing more than to curl up with one of her favourite books.

Quiet, cautious Pearl has always adored her bold, brash, bad big sister Jodie. When their parents get new jobs at a grand, fusty old boarding school, Melchester College, the girls have to move there – and when they arrive, things start to change. Jodie has always been the leader – but now it's Pearl who's making new friends. Jodie just seems to be getting into more and more trouble – arguing with Mum, scaring the little children, flirting with the gardener.

Dolphin adores her mother, Marigold. She's got wonderful clothes, bright hair and vivid tattoos all over her body – a colourful lady, to match her colourful life. But Dolphin's older sister, Star, is beginning to wonder if living with Marigold's fiery, unpredictable moods is the best thing for the girls.

Violet has always been in the shadow of her mesmerising, controlling brother, Will - by turns delightful and terrifying. Now that Will has learnt a shocking secret about his own past, things seem to be getting worse. Violet retreats further into her fantasy world built around the fairy characters created by her favourite author, Casper Dream.

I'm Sadie and I'm nearly nine. Mum's a childminder, but she doesn't have to mind me. I can mind myself, easy-peasy. Lucky for Mum, because now she's got the flu, so I've got to mind her – and help with all the babies!

Hi! I'm Charlie (DON'T call me Charlotte – ever!). History is boring, right? Wrong! The Victorians weren't all deadly dull and drippy. Lottie certainly isn't. She's eleven – like me – but she's left school and has a job as a nursery maid. Her life is really hard, just work work work, but I bet she'd know what to do about my mum's awful boyfriend and his wimpy little son. I bet she wouldn't mess it all up like I do ...

Gemma and Alice were born on the same day and have been devoted best friends ever since. Despite Gemma's larger-than-life personality and Alice's quieter, calmer character, the two are inseparable – until Alice has to move house, all the way to Scotland. Gemma is utterly distraught, particularly at the thought that Alice might find a new best friend. Is there anything Gem's brothers, or perhaps her Grand dad, can do to help?