Used Book – Mauve, Marie Desplechin

But... but what's going on right now? Pome is in a terrible mood, Verte is shutting herself in her room. We know them though, this isn't like them at all. An adolescence crisis? That would be too easy. Fatigue? Certainly not. When Pome comes home from school with a bruise on her face, there's no longer any doubt: something is wrong. Since the arrival of a new student at the middle school, everything seems to have gone haywire. A new student... which new student? Verte and Pome absolutely refuse to talk about her. As soon as her name is mentioned, a centipede appears! And what does the police do in these cases? And what do witches do?