Spacemouse Geronimo Stiltonix's adventures are out of this world! While at the beach, Geronimo Stiltonix stumbles upon a mysterious treasure map! The spacemice

Spacemouse Geronimo Stiltonix's adventures are out of this world! The on board computer on spaceship MouseStar 1, Hologramix, is out of order! To fix it, Geroni

Geronimo Stilton meets outer space in this cosmically fun spin-off series! Meet Geronimo Stiltonix:He is a spacemouse -- the Geronimo Stilton of a parallel univ

Friends of the spacemice have disappeared on a strange ice planet, Polarix! Geronimo Stiltonix and his crew are called to search for them. When the spacemice ar

Geronimo discovers a planet on the radar that mysteriously appears and disappears. MouseStar 1 lands to investigate and they discover mysterious aliens who hide