"Geronimo Stilton is the editor of the Rodent's Gazettte, the most famouse paper on Mouse Island. In his free time he loves to tell fun, happy stories. In these adventures, Geronimo has to face his worst enemies, the pirate cats, who have discover a way to travel back in time and change history ... Geronimo, Thea, Benjamin, and Trap Stilton, and others, must hop into the speedrat, their awesome time machine invented by Professor Volt, and defeat the evil schemes of the pirate cats, all while experiencing breathtaking moments in history. Discovery of America: Geronimo and his friends travel back to 1492 to join Christopher Columbus on his voyage and stop the Pirate Cats from stealing the ship and taking credit for America's discovery for themselves. The secret of the Sphinx: Geronimo and his friends travel back in time to stop the Pirate Cats from tricking the pharaoh Chephren into changing the face of the Great Sphinx into a cat's face. The Coliseum con: Geronimo and his friends travel back to the Rome, Italy, of 80 A.D. in order to stop the Pirate Cats from taking credit for designing the Colosseum, Rome's largest amphitheater.