Geronimo Stilton: Spacemice #7: Beware! Space Junk!
Age Level: 7 - 10
Lexile Measure: 690L
MouseStar 1 is surrounded by floating space junk! It's yucky -- and dangerous. Geronimo Stiltonix tracks down the source of the junk, and meets very wasteful aliens. Even worse, robots that the aliens threw away have started to rebel! Can the spacemice restore harmony before the robots take over?