Geronimo Stilton visits Australia where he has an adventurous time dodging sharks and snakes, and getting lost in the Outback.

Geronimo tries to enjoy his seaside vacation even though his hotel is dilapidated.

While Geronimo's out with his family celebrating his birthday, he realizes someone's replaced all of his money with counterfeit bills. He and Hercule set out to find the thief

Accepting an ugly crystal figurine from Petunia Pretty Paws, Geronimo Stilton discovers a mysterious message inside the figurine from a Venetian mouse who requires assistance.

Asked by a Bollywood star for help protecting a valuable ruby, Geronimo Stilton and Hercule Poirat are inadvertently cast in the actress's film in spite of limited acting skills and are horrified when an anonymous thief makes off with the ruby.

Geronimo Stilton, who is a normal mouse that does not like adventure, is dragged along to accompany his super-sporty friend Bruce Hyena on a series of outrageous adventures to toughen him up.

When, in the process of testing his newest time machine, Professor von Volt accidently brings a triceratops, Helen of Troy, Attila the Hun, Charlemagne, and Christopher Columbus to present day New Mouse City, it is up to Geronimo and his friends to return them all to their own times and places--without being eaten by a T-Rex or skewered by Trojan warriors.

"Fairies, dragons, wizards, and more await Geronimo on every magical Kingdom of Fantasy adventure! For the first time ever the magic of the Kingdom of Fantasy reaches the streets of New Mouse City!"--

"Geronimo, Thea, and Trap were invited to a spine-tingling mystery dinner at Cacklefur Castle! There they find spiders, bats, and ... something slimy! Can Geronimo solve teh mystery before he is frightened out of his fur?"--Back cover.

While five little mice at Mouseford Academy are looking for their missing biology professor, they dive to a haunted shipwreck off Whale Island to find a rare diamond that was lost when the ship sank.