The classic boarding-school series from the best-loved author of the Famous Five - loved by readers for more than 70 years.
In Enid Blyton's bestselling school series Elizabeth Allen is sent away to boarding school and makes up her mind to be the naughtiest pupil there's ever been.
Book 4: Here's the Naughtiest Girl
There's a new boy in Elizabeth's class, who'll do anything to show her up. It's hard for the naughtiest girl to keep her temper when faced with such a challenge ...
Book 5: The Naughtiest Girl Keeps a Secret
Elizabeth's efforts to put her naughty days behind her are threatened when John trusts her with a secret. She finds herself in more trouble than ever before.
Book 6: The Naughtiest Girl Helps a Friend
It's hard to be good at camp with Arabella in the same tent. She's causing all sorts of problems for Elizabeth and her best friend Joan.
Book 7: The Naughtiest Girl Saves the Day
Elizabeth is a suspect when some plants are vandalised. She isn't to blame - and who would want to get her intro trouble? With help, she vows to get to the bottom of the mystery.
Between 1940 and 1952, Enid Blyton wrote four novels about Naughtiest Girl, Elizabeth Allen. Books 5-10 are authorised sequels of the series written by Anne Digby in 1999. Both cover and inside illustrations were created by Kate Hindley in 2014.
Enid Blyton's books have sold over 500 million copies and have been translated into other languages more often than any other children's author.
She wrote over 700 books and about 2,000 short stories, including favourites such as The Famous Five,The Secret Seven, The Magic Faraway Tree, Malory Towers and Noddy.
Born in London in 1897, Enid lived much of her life in Buckinghamshire and adored dogs, gardening and the countryside. She died in 1968 but remains one of the world's best-loved storytellers.