Who is Geronimo Stilton? That's me! I run a newspaper, but my true passion is writing adventure stories. Here in New Mouse City, the capital of Mouse Island, my books are all bestsellers! My stories are funny, fa-mouse-ly funny. They are whisker-licking-good tales, and that's a promise! GERONIMO STILTON, SECRET AGENT My sister, Thea, is the mystery-loving rodent, not me! But somehow I found myself going underground to find an important missing document. Slimy Swiss cheese I hardly knew where to start! Geronimo Stilton, Secret Agent Mouse? Maybe I could get used to that....