We'll Bite Your Tail, Geronimo! (Geronimo Stilton Spacemice #11)

Professor Greenfur, the onboard scientist on spaceship MouseStar 1, has changed color from green to... orange! What's going on? To find out, the spacemice travel to his home planet of Photosyntheson. There, they learn that all of Professor Greenfur's relatives are being threatened by the nibblix, tiny aliens with very sharp teeth! Can the spacemice help in time?

• The Invisible Planet (Geronimo Stilton Spacemice #12)
• Pirate Spacecat Attack (Geronimo Stilton Spacemice #10)
• Slurp Monster Showdown (Geronimo Stilton Spacemice #9)
• Away in a Star Sled (Geronimo Stilton Spacemice #8)
• The Chocolate Chase (Geronimo Stilton #67)
• The Underwater Planet (Geronimo Stilton Spacemice #6)
• Beware! Space Junk! (Geronimo Stilton Spacemice)
• Rescue Rebellion (Geronimo Stilton Spacemice #5)
• Geronimo Stilton Spacemice #4: The Galactic Goal
• Geronimo Stilton Spacemice #1: Alien Escape