My Name is Stilton, Geronimo Stilton

The book introduces Geronimo Stilton, a talking mouse who lives in New Mouse City on Mouse Island. Geronimo is the editor of the Rodent's Gazette, the most famous paper on the island. In this adventure, Geronimo's sister Thea discovers an old map showing a secret treasure hidden on a faraway island. Geronimo and his family set off to find the treasure, facing numerous fun and humorous challenges along the way.