I couldn't believe it. I, Geronimo Stilton, had to travel back in time to save a friend! Professor Paws von Volt needed my help. He had traveled to the past alone to prove that an artifact in the Egyptian Mouseum was genuineand now he was lost in time! My friends and I boarded the professor's newest time machine to go find him, and ended up on a crazy trip through history. We met Cleopatra, Genghis Khan, famouse poet Dante, Queen Elizabeth I, and more. It was a fabumouse journey! But could we find the professor and make it back to the present?