This book is the tenth book in the popular series by Enid Blyton, The Naughtiest Girl.
Summary of the Book
Elizabeth, the naughtiest girl, is delighted that she has been made the monitor again. Everything might have gone well for her is it wasn?t for a 2nd form boy who decided to get all the other boys against her. The naughtiest girl is out to find out who did this and why they have a grudge against her.