Geronimo Stilton: Spacemice

#11--Professor Greenfur, the onboard scientist on spaceship MouseStar 1, has changed color from green to orange! What's going on? To uncover that mystery, the spacemice travel to Professor Greenfur's home planet only to find the Professor's family is threatened by tiny aliens with very sharp teeth.

He is a spacemouse - the Geronimo Stilton of a parallel universe! He is captain of the spaceship MouseStar1. While flying through the cosmos, he visits distant planets and meet crazy aliens. His adventures are out of this world! -- Alien Escape -- 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?.