When Geronimo Stilton finds out that the Pirate Cats are going back in time to Venice in the year 1517, he knows they must be after one thing: The Mona Lisa! Geronimo and friends must travel to Renaissance Italy to stop the Pirate Cats from stealing the Mona Lisa and taking credit for what is arguably the world's most famous painting. But the Pirate Cats have an ace up their sleeve: someone in Geronimo's crew is an impostor!

Geronimo travels back in time to help a young Wolfgang Amadeus Mozart, who is the target of the maddest pirate cats' scheme yet. The fiendish felines are in 18th century Italy to steal musical scores by Mozart before he can perform at a historic concert.

Geronimo, Benjamin, Trap, Petunia, and Bugsy Wugsy, go back in time to Germany in the 1400s to stop the pirate cats from sabotaging the workshop of Gutenberg - the inventor of the printing press.

Traveling to the American west to stop the Pirate Cats' evil scheme, Geronimo Stilton makes sure that the work on the Transcontinental Railroad is completed.

Traveling to 1896 Paris, Geronimo and his friends try to stop the Pirate Cats from stealing the first cinematograph, an invention that ushered in the age of motion pictures.

Geronimo and his friends journey to the eighteenth century to stop the Pirate Cats from pillaging the East India Company's merchant ships.

Geronimo Stilton, top reporter for The Rodent's Gazette, keeps has a reputation of breaking the top news stories first to the citizens of New Mouse City. But lately, Sally Ratmousen of rival Paper "The Daily Rat," has been leaking Geronimo's secret scoop! Can Geronimo keep the lid on a surprise celebrity guest to the city's 100 year celebration or will Sally rat him out?

"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.