The day I became a wolf too - Amelie Javaux

Fairy tales aren't the only ones with a big bad wolf. My school has one too. Her name is Agnes and she roams around with her pack. To put an end to her teasing and find friends, I ended up becoming a... "wolf" myself.
(From the back cover of the book)

A book that talks to children about school bullying, aiming to approach them from the perspective of both the victim and the bully, as well as the parents, so that we can understand each person's position and equip ourselves with the appropriate resources to deal with it.

See the book illustrator's comments on the 4th edition here

Author: Amelie Javaux
Illustrator: Annick Masson
Performance: Antonis Papatheodoulou
Pages:
Dimensions:
3rd edition-November 2023
ISBN: 9786185568177
Ages: 6+