Lost Treasure of the Emerald Eye: 01 Geronimo Stilton Who is Geronimo Stilton? That's me! I run a newspaper but my true passion is writing tales of adventure. Here is 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! Lost Treasure of Emerald Eye: It all started when my sister, Thea, discovered an old, mysterious map. It showed a secret treasure hidden on a faraway island. In no time at all, my sister dragged me and my cousin Trap into her treasure hunt. It was an adventure I'd never forget.