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Geronimo Stilton

The Underwater Planet (Geronimo Stilton Spacemice #6)

By : Geronimo Stilton

For Ages:

7 - 10


Chapter Books

While at the beach, Geronimo Stiltonix stumbles upon a mysterious treasure map! The spacemice follow it and end up on Aquarix, a planet that's entirely underwater. During their exploration, they face fur-eating seaweed, ferocious piranha aliens, and . . . pirate spacecats! Squeak! Can the spacemice keep the spacecats from stealing the treasure?


  • Genre: Chapter book
  • Lexile Measure: 600L
  • ISBN: 9780545872430
  • Age Level: 7 - 10
  • Format: Paperback