Description
A suspected burglary, a fall down the stairs, a mysterious letter, and a slightly crazy mailwoman. It doesn't take much for Norbert to plunge into an adventure that, at first glance, makes neither head nor tail. Is his beloved grandmother truly on the verge of dementia, or does her apparent delirium hide a kernel of truth that only he can unearth? A mission filled with puzzles, gadgets, and espionage awaits Norbert. Accompanied by his best friend Luna, he will discover a well-protected family secret that will change his life forever. A novel by Mélodie Heuser.