Geronimo and his friend Hercule Poirat venture into the sewers to find the origin of the horrible stink that is driving all the mice away from New Mouse City--and learn an important lesson about recycling.

When the quest to find a cure to an epidemic targeting the citizens of New Mouse City is sabotaged, Geronimo Stilton must figure out who's behind it all before he ends up covered in blue spots too.

Geronimo Stiltonix takes MouseStar 1's broken computer to a distant planet to be repaired by a brilliant inventor, but pirate spacecats attack and steal the device, and the spacemice must retrieve it before the machine can be turned against them.

When Geronimo gets a call to help Hercule Poirat solve a mystery at the same time as his date with Petunia Pretty Paws, what is a gentlemouse to do?

When his cousin is captured by the king of the dragons, Geronimo must deliver the Crown of the Seven Rubies to free him.

Geronimo travels to Egypt to interview Professor Alrat Spitfur and learns the secret of the Seven Wonders of the Ancient Mouse World.

Enter the world of Geronimo Stilton, where another funny adventure is always right around the corner. Each book is a fast-paced adventure with lively art and a unique format kids 7-10 will love. My sister, Thea, is the mystery-loving rodent, not me! But somehow I found myself going undercover to get to the bottom of a case. Slimy Swiss balls - I hardly knew where to start! Geronimo Stilton, Secret Agent Mouse? Maybe I could get used to that...Geronimo...

When the Cavemice discover a giant oyster in the lagoon near Old Mouse City, they call on Geronimo Stiltonoot to help them fish it out of the water before the saber-toothed tigers find the pearl.

When their cousin is stung by a cavefly and falls into a deep sleep, Geronimo and Thea set out in search of the rare pink stinkrose, whose petals are thought to provide a cure.

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