"A new ride is opening at Luna Park! Every mouse in New Mouse City has come for the grand opening. But the rides keep breaking down, and everything is going wrong. Can Geronimo and his friends figure out who is sabotaging the opening of the Train of Terror?"--Publisher.

When Thea Stilton travels to Ireland to search for a missing agent, she finds that the whole fantasy Land of Erin is being threatened by earthquakes, and soon Will Mystery and the Thea sisters follow to help her find the secret of the fairies.

Geronimo hunts the thief who stole the precious Black Papyrus from New Mouse City's Egyptian Mouseum.

Geronimo Stilton participates in the New Mouse City Song Festival, after his friend Champ Strongpaws enters him.

My sister, Thea, is the mystery-loving rodent, not me! But somehow I found myself going undercover to get to the bottom of a case. Slimy Swiss balls -- I hardly knew where to start! Geronimo Stilton, Secret Agent Mouse? Maybe I could get used to that. ...

Welcome to the world of the Thea Sisters! To celebrate Mouse Academy's 600th anniversary, the headmaster and teachers decide to stage a performance of William Squeakspeare's favorite play Mouseo & Juliet! The Thea Sisters all want the part of Juliet, but so does their rival, Ruby Flashyfur. Who will be the star of the show?

It was Christmastime on Mouse Island, and I couldn't wait to celebrate with my friends and family. Until I learned that they were all traveling out of town for the holidays, and I'd be spending Christmas alone! I was depressed, down, despondent, and starting to feel like a real grinch! I wandered the streets of New Mouse City, feeling sorry for myself. But then I discovered an amazing surprised that taught me the true meaning of Christmas.

Holey cheese, it was strange! All across New Mouse City, rodents kept telling me I'd done things I had no memory of. Was I going crazy? Had the cheese finally slipped off my cracker? No, that wasn't it. I soon discovered the truth: There was a Geronimo lookalike going around, pretending to be me! He'd even fooled my sister Thea. Worst of all, he was trying to take over The Rodent's Gazette! I had to get that greedy impostor's paws off my newspaper,...

Our second time-traveling adventure was in ancient Egypt. We were there to discover how the Great Pyramid of Giza was built. But when we got there, we were arrested by the Grand Vizier and taken to see the pharaoh - who had us thrown in the dungeon! Would we be able to escape, or would we be fed to the crocodiles?