My second book by this author, and another enjoyable tale with a touch of Roald Dahl about it. Robert Poutifard is a teacher who has just retired from teaching. He listens to the epithets at his retirement, but disagrees with it all. He is glad to be done with teaching, and hates children, and thinks they are little monsters. Indeed, he plans three grand acts of revenge against the three worst offenders who humiliated him over the years.
The book is filled with humour, although not quite wholly tongue in cheek. The three terrible acts by the children were not just imagined it seems. The first was almost farcical in its description, in a way young readers will love. The various acts of revenge are also funny, although in the end there is (as one might hope) a strong message of hope and forgiveness, which rescues the story from dwelling on buried grievance.
Written in French, I picked up quite a lot of the language humour but may have missed some. All the same it was a great book that children will love. English speaking children learning French, however, would probably find it too much work unless they are already quite fluent, and they would need help with spotting the puns and such.