The Invisible Planet (Geronimo Stilton Spacemice #12)

Geronimo discovers a planet on the radar that mysteriously appears and disappears. MouseStar 1 lands to investigate and they discover mysterious aliens who hide a secret!

• No Time To Lose (Geronimo Stilton Journey Through Time #5)
• Cyber-Thief Showdown (Geronimo Stilton #68)
• The Hunt for the Colosseum Ghost (Geronimo Stilton Special Edition)
• Pirate Spacecat Attack (Geronimo Stilton Spacemice #10)
• Slurp Monster Showdown (Geronimo Stilton Spacemice #9)
• We'll Bite Your Tail, Geronimo! (Geronimo Stilton Spacemice #11)
• The Underwater Planet (Geronimo Stilton Spacemice #6)
• The Helmet Holdup (Geronimo Stilton Micekings #6)
• The Dragon Crown (Geronimo Stilton Micekings #7)
• Hug a Tree, Geronimo (Geronimo Stilton #69)