While vacationing at Skull Castle, Geronimo encounters a ghost cat that is threatening the special pumpkins that grow in the Von Cacklefurs' garden, and it's up to him to find out who wants to steal the pumpkins.

It all started when my sister, Thea, discovered a mysterious map. It showed a secret treasure on a faraway island. And before I could let out a squeak of protest, Thea dragged me into her treasure hunt! In no time at all, we'd set sail for the island. It was an adventure I'd never forget....

When a celebrated goldsmith from Hawaii creates a necklace for a famous actress, rumors that the necklace is about to be stolen prompt Geronimo Stilton's investigation to identify the thief.

Holey cheese, it was strange! All across New Mouse City, rodents kept telling me I'd done things I had no memory of. Was I going crazy? Had the cheese finally slipped off my cracker? No, that wasn't it. I soon discovered the truth: There was a Geronimo lookalike going around, pretending to be me! He'd even fooled my sister Thea. Worst of all, he was trying to take over The Rodent's Gazette! I had to get that greedy impostor's paws off my newspaper,...

When a haunted dinosaur wreaks havoc across Mysterious Valley, Creepella tries to tackle the beast and brings Geronimo along for help.

When director Mousen Scorsese's newest film goes missing at New Mouse City's first film festival, Hercule and Geronimo spring into action to solve the case.

"My sister Thea and my cousin Trap were not getting along! When Grandfather found them arguing over who would get to join me on a trip to Brazil, he forced us all to go together. My friend Isabela needed my help finding a mysterious emerald. Could Trap and Thea stop shouting their snouts off long enough to help find the stone?"--

"Oh, no! One of the special miceking helmets in miceking chief Sven the Shouter's private collection has been stolen! Could it have been taken by the vilekings--the rival mouse clan? The micekings journey to the vilekings' village to find out . . . and while they're there, the dragons attack! Can all the mice work together to save their fur?"--Page 4 of cover

When Geronimo Stilton learns someone wants to steal the antique silver skates being offered as a prize in Mouse Island's annual winter Ice Skating Championships, he races to uncover the mysterious thief and save the prize.

"Sally Ratmousen, Editor-in-Chief of The Daily Rat and Geronimo Stilton's biggest journalistic rival, mysteriously disappears one afternoon on the way to her car after work. Her ace reporter, Simon Squealer, shows up at Geronimo's door with the troubling news ... and reveals that notorious mobster Barry the Moustache is behind her disappearance. Is he telling Geronimo the truth or is this fake news? If it's a hoax just to generate headlines, Geronimo...