When they receive a damaged message in a bottle from the Oofa Oofa rodents in the ancient far north, Geronimo Stiltonord and the micekings set sail to Oofadale but are attacked by a band of dragons while on their voyage.

All the mammoths have fled Old Mouse City! It's a total cat-astrophe! Not only because mammoths are valuable allies of the cavemice, but also because without them, the cavemice can't make mammoth milkshakes, their delicious national drink. Geronimo Stiltonoot must embark on a daring journey to find the mammoths...and avoid going extinct before he gets back!

Geronimo travels to Ratzikistan to help his grandfather write a guide book about this remote area Reading level: RL 3 ; Ages: 7-10

Reading level: RL 3 ; Ages: 7-10

Reading level: RL 3 ; Ages: 7-10

Geronimo Stilton dreams of a quiet vacation at the beach, but ends ups at a fleabag hotel that is falling apart Reading level: RL 3 ; Ages: 7-10

Reading level: RL 3 ; Ages: 7-10 There is a Geronimo lookalike going around and worst of all, he is trying to take over 'The Rodent's Gazette!'

Reading level: RL 3 ; Ages: 7-10

Geronimo, Thea, and their cousin Trap explore an old castle built by Grant Gentlemouse, the founder of New Mouse City, and when they find one hundred keys and only ninety-nine doors inside, they set off in search of the missing room.

Geronimo Stilton has to risk his tail in a crazy TV game show in order to save his newspaper from a mysterious one-eyed rat.