Geronimo discovers a planet on the radar that mysteriously appears and disappears. The crew of "MouseStar 1" investigates and finds mysterious aliens who hide a secret! 5 5/16 x 7 5/8.

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

Geronimo discovers a planet on the radar that mysteriously appears and disappears. The crew of "MouseStar 1" investigates and finds mysterious aliens who hide a secret! 5 5/16 x 7 5/8.

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

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 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!ALIEN ESCAPEGeroimo 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?

When Space mouse Geronimo Stiltonix helps an alien spacecraft get back to its home planet, their queen becomes enchanted by Geronimo, and tries to force him to marry her and stay on the planet Flurkon forever.

Upon discovering a planet that mysteriously appears and disappears, Geronimo Siltonix and his crew land the MouseStar 1 to investigate and they encounter a race of secret-keeping aliens.