Auzou Book for the investigations of anatole bristol tome 5 anatole contre arsene lapin

Book 5: Anatole is now a seasoned and well-known school detective! So much so that a mysterious thief is causing panic in class, under the funny name of "Arsène Lapin." Every day, Anatole will uncover coded messages, unexplained thefts, and increasingly complicated puzzles to solve... But who is Arsène Lapin really?