Geronimo travels through time once again to return tops the Triceratops, Helen of Troy, Attila the hun, Charlemagne and Christopher Columbus to their proper time periods. But Geronimo and his friends aren't sure Professor von volt's new machine works perfectly. Will they make it back.

Geronimo Stilton is the pseudonym of the famous Italian writer Elisabetta Dami. She has written the famous series of books on Geronimo Stilton. She co-owns the Italian based publishing company called Edizioni Piemme. She likes to get all her ideas through her travels to places around the world.