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? 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.