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 8: Well Done, The Naughtiest Girl

Elizabeth is desperate to play the piano in the end of school concert. But Arabella is very good, and so Elizabeth spends every waking minute practising. But what about all the exams? Will the Naughtiest Girl have to stay in First Form another year?

Book 9: Naughtiest Girl Wants To Win

When new girl and famous young actress Kerry becomes head girl, Elizabeth is convinced that the seniors have been swayed by her acting skills alone. The real Kerry is a nasty piece of work - but how can she prove it?

Book 10: Naughtiest Girl Marches On

Elizabeth is overjoyed to be appointed monitor again. But one of the second form boys is turning all the other boys against her, starting with a nasty note in her desk. Can she find out who has a grudge against her - and why?

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.