The Naughtiest Girl is a Monitor is a children’s novel by Enid Blyton published in 1945, the third in The Naughtiest Girl series of novels.
Elizabeth has been chosen to be a monitor this coming term. She’s getting bored and lonely so Arabella comes to stay. Elizabeth dislikes Arabella a great deal and the dislike is mutual but Elizabeth hides her dislike as best she can, knowing from experience making enemies creates rows and unhappiness. There are four new children that term, Julian, a likeable, lazy, clever chap who bothers to make a model plane that flies beautifully but can’t be bothered to learn history dates Martin, a shifty thief and Rosemary, a timid, spineless girl. Julian suggests Elizabeth makes friends with him because Joan has gone into a higher form.
Soon Rosemary complains that she’s lost some money and no, she hasn’t got a hole in her pocket or purse so Elizabeth marks a coin to catch the thief which soon to Elizabeth looks like Julian. She confronts him about it, they have a quarrel and Julian plays tricks which cause Elizabeth to be unjustly sent outside. When Elizabeth catches Julian stealing biscuits she complains about him, but finds out they were part of the midnight feast menu. She has to step down from being a monitor and a new one is selected.
Elizabeth explains everything to William and Rita and Julian tells his side of the story and says that Elizabeth was not misbehaving in class and Elizabeth laughs at his confession, making them friends again. Only the mystery of the nasty thief in the first form is left to uncover.
