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      The Underwater Planet

      by Geronimo Stilton
      Published
      Feb 2016
      Main Genre
      Science Fiction Sci-Fi
      Rating
      Pages
      128
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      Series
      Geronimo Stilton Spacemice Book 6

      About This Book

      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?

      Series Placement

      Book 6
      🟡 Mostly Standalone
      View full series order

      Genres & Themes

      Genres

      Speculative Fiction

      Subgenres

      Action Adventure Science Fiction

      Themes

      Comedy / Humor

      Age Level

      Kids (12 & Under) Kids: Chapter Books

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      Formats & Editions

      Browse the different covers, formats, and publication history for this title.

      Paperback

      Paperback edition cover
      Paperback
      First Edition Feb 2016 Scholastic ISBN 054587243X
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      Hardcover

      Hardcover edition cover
      Hardcover
      Feb 2016 Turtleback Books ISBN 0606380949
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      eBook

      eBook edition cover
      eBook
      Jan 2016 Scholastic Paperbacks ISBN B010BYMTJO
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      eBook edition cover
      eBook
      Jan 2016 Scholastic, Inc. ISBN 0545875277
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