Who is Geronimo Stilton? That's me! I run a newspaper, but my true passion is writing tales of adventure. Here in New Mouse City, the capital of Mouse Island, my books are all bestsellers! My stories are full of fun - tastier than Swiss cheese and tangier than extra-sharp cheddar. They are whisker-licking-good stories, and that's a promise! Holey cheese, it was strange! 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, I soon discovered the truth. There was a Geronimo look-alike going around, pretending to be me! 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. But how?