Geronimo Stilton meets outer space in this cosmically fun spin-off series! Friends of the spacemice have disappeared on a strange ice planet, Polarix! Geronimo

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

When an evil professor begins threatening New Mouse City with terrible inventions, Geronimo Stilton is enlisted by local authorities to embark on a top-secret m

Geronimo Stilton meets outer space in this cosmically fun spin-off series! Friends of the spacemice have disappeared on a strange ice planet, Polarix! Geronimo

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