While at the beach Geronimo Stiltonix stumbles upon a mysterious treasure map The spacemice follow it and end up on Aquarix a planet that 39 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? About the Author Geronimo Stilton While at the beach Geronimo Stiltonix stumbles upon a mysterious treasure map The spacemice follow it and end up on Aquarix a planet that 39 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? About the Author Geronimo Stilton is the publisher of The Rodent 39 s Gazette Mouse Island 39 s most famouse newspaper. He is Rattus Emeritus of Mousomorphic Literature and Neo-Ratonic Comparative Philosophy. In his spare time Mr. Stilton enjoys collecting antique cheese rind