Geronimo Stilton: respected journalist, family mouse ... well-seasoned traveller? No thank you! But when Geronimo's sister Thea finds a mysterious map of a secret treasure on a faraway island, Geronimo just can't say no. Before long, Geronimo and his family are on the high seas, getting into enormouse trouble!The series is perfect for 5 to 8 year old's both avid and reluctant readers due to its expressive typeset, fun illustrations and humorous stories.