She's tried being the naughtiest pupil there, but now she's got a new challenge... In book four, there's a new boy in Elizabeth's class.

He's sulky and grumpy and he'll do anything to show Elizabeth up. She means to keep her temper, but it's not so easy for someone who was once the naughtiest girl in the school... 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. Bonus material: A rare, complete serial story about a very special school. An interview with Enid Blyton about her school days.

Enid Blyton's experiences as a teacher. A timeline of the author's life. Photos from Enid Blyton's younger days.