From the Jurassic period and the dinosaurs, to a medieval castle, Geronimo Stilton and a few members of his family embark on an adventure through time in Professor von Volt's new time machine, the Mouse Mover 3000.
After Geronimo Stilton who runs a newspaper is coaxed by his nephew Benjamen to go to a cemetery to do research on his current book, he encounters Creepella von Cacklefur who succeeds in locking Geronimo in a coffin.
When Creepella meets an old friend of Grandpa Frankenstein who claims his castle has been infested with ghosts and monsters, she enlists the help of her friends and family to drive the ghouls out.
The cat pirates are coming to town and are planning on stealing New Mouse City's Statue of Liberty and taking it back to Cat Island. They think it's completely made of gold! Geronimo and his friends are determined to protect their city's precious symbol.
Geronimo Stilton and friends travel back in time to Ancient Egypt to stop the Pirate Cats from coercing the Pharaoh into changing the face of the Sphinx from a man to a cat.
Mouse journalist Geronimo Stilton is accidentally registered to participate in the Mouse Island Marathon. He relies on friends and family to help him train for and survive the event. Includes a list of tips from Geronimo for people training for their own marathons.