Geronimo Stilton Spacemice Beware Space Junk (P)

MouseStar 1 is surrounded by floating space junk! It's gross -- and dangerous. Geronimo Stiltonix discovers that it comes from wasteful aliens on a nearby planet. Even worse, robots that the aliens have thrown in the trash have started to rebel. It's up to the spacemice to restore harmony on the planet . . . and help them clean up.