Geronimo Stilton is the editor of the Rodent's Gazette, the most famous paper on Mouse Island. In his free time he loves to tell fun, happy stories. In this adventure, Geronimo has to face his worst enemies, the Pirate Cats, who have discovered a way to travel back in time and change history...
...Where would Geronimo Stilton's books and newspaper be if no one had invented the printing press? It would have been a whiskerful of a mess! To avoid exactly that disaster, Geronimo, together with 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!