Age Level: 7 - 10
Lexile Measure: 570L
Geronimo Stiltonix and his crew head to the planet Jurassix to warn its inhabitants of a giant comet heading straight toward them! But the creatures there turn out to be ferocious, dinosaur-like beasts . . . who like to eat rodents. Squeak! Can the spacemice save these aliens and still make it out alive?