Geronimo Stilton travels back in time to try and stop the Pirate Cats from infliltrating the Roman Senate and taking credit for building Rome's largest amphitheater, the Colosseum.

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 imposter!

"Utah, USA, 1869. Work on the Transcontinental Railroad connecting the east and west coasts keeps suffering mysterious mousehaps. Can it be the dastardly work of Catardone and his band of Pirate Cats? In the unlikely role of deputy sheriff, Geronimo Stilton must once again save the future by protecting the past!"--Amazon.com.

"Everyone is talking about Windy Island's new surf center, even Nicky's hero, Australian surf champion Gary Moon! The artifical reef is supposed to create perfect waves. But the Thea Sisters have discovered a dangerous secret: even a surf champion can't face these giant waves! It's up to them to break the story before another reef is built off the shore of their beloved Donkey Beach."--Page 4 of cover.

"Mouseford Academy is planning a spring field trip to the waterfallin the forest, but angry bears are chasing people! Something strange is going on-- could Vissia de Vissen be up to her nefarious tricks again? If Colette, Nicky, Pamela, Paulina, and Violet don't figure out what's happening, the whole forest could be turned upside down. But not even Vissia de Vissen can steal a waterfall-- can she?"--Page 4 of cover.

"Mouseford Academy students are taking a special hot-air balloon tour of Whale Island and beyond, but when they pass over Turtle Island, they see a lack of turtles and a whole lot of trash! And for once, the selfish Vissia de Vissen seems worried about this mysterious disappearance too! In order to solve this riddle, Colette, Nicky, Pamela, Paulina, and Violet will have to do the impossible--team up with Vissia de Vissen and her children Vic and Vanilla!...

While visiting a filmmaker friend on the set of a new movie with Thea, Benjamin, and Pandora, reporter Geronimo Stilton investigates mysterious accidents that are plaguing production and causing the film to go off course.

Geronimo Stilton is invited to a rat-jitsu martial arts championship in a snowy faraway land, much to the famouse reporter?s surprise. With his helpful relatives, Thea, Trap and Benjamin, Geronimo goes to cover the event for the Rodent?s Gazette. But something strange is happening.

"It's the most exciting race the city has ever seen. Geronimo wants no paw in it, but it's a matter of Stilton family honor. The cars are fast, the road is winding, and the racers are...cheating! Can Trap and Geronimo figure out who is rigging the race?"