Geronimo Stilton gets caught up in the World Karate Championships, thanks to the efforts of Bruce Hyena and Piccolo Tao, Bruce's super-sporty cousin. Geronimo only has a week to become real champion material! Will Geronimo manage to overcome his fears in order to win the competition?

I am not the kind of mouse who spends money on useless things. But one day I kept getting packages of things I did not order or need. Someone on the Internet had stolen my identity! Professor Margo Bitmouse, a well-known computer expert, helped me track down the hacker. Could I find the thief before my reputation is was ruined?

When Wild Willie showed up at my door and invited me to travel with him to Japan, I jumped at the chance. We were in search of an ancient, legendary samurai scroll that holds the secret to a long-lost fighting technique. The scroll had fallen into the wrong hands, and it was up to me and Wild Willie to track it down and save the day. But first, we would have to fight a group of talented ninjas. Holey cheese -- this would be one adventure I would never...

When Valentine's Day arrives, Geronimo is excited about his date with Petunia Pretty Paws until detective Hercule Poirat needs help in finding the missing famous painting in New Mouse City.

Geronimo's relaxing solo vacation in the Black Hills of South Dakota turns into a crazy treasure hunt, with the entire Stilton clan in tow.

"I, Geronimo Stilton, was off to the wildest part of Brazil - the Amazon jungle! I ended up on a hunt for a rare crystal treasure, which was stolen from a native tribe in the heart of the forest. I'd encounter alligators, snakes, piranhas, and other dangers on my way. Holey cheese! What an adventure!" -- Back cover.

When Geronimo gets a call to help Hercule Poirat solve a mystery at the same time as his date with Petunia Pretty Paws, what is a gentlemouse to do?