Geronimo sets off for Ratoff in spooky Transratania, a garlic-fuelled town full of mystery. Even the inhabitants of Ratoff Castle are strange. Maybe it's the way they sleep during the day, or the blood-red drink they're always sipping on, but there's something not quite right about them ...Who are these mice? Will Geronimo survive the night?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. 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.