Geronimo Stilton is out of this world in an all-new spin-off series!
Meet Geronimo Stiltonix: He is a spacemouse - the Geronimo Stilton of a parallel universe! He is captain of the spaceship MouseStar 1
. While flying through the cosmos he visits distant planets and meets crazy aliens. His adventures are out of this world!
Geronimo Stiltonix's spaceship is in danger of exploding! The only solution is to replace the engine's batteries by tracking down a rare element. When a group of mysterious aliens claim they can help, Geronimo is relieved. But are the aliens as friendly as they seem?