Book 1

Alien Escape

by Geronimo Stilton

Published 29 April 2014

Book 1

Alien Escape

by Geronimo Stilton

Published 29 April 2014
Space mouse Geronimo Stiltonix must replace the batteries in his damaged spaceship by tracking down a rare element, but he is wary of a group of mysterious aliens who offer their help.

Book 2


Book 2

YOU'RE MINE CAPTAIN #2

by Geronimo Stilton

Published 1 September 2014

Book 3

Ice Planet Adventure

by Geronimo Stilton

Published 27 January 2015

Book 3

#3 Ice Planet Adventure

by Geronimo Stilton

Published 27 January 2015

Book 4

Galactic Goal

by Geronimo Stilton

Published 28 April 2015

Book 5

Rescue Rebellion

by Geronimo Stilton

Published 25 August 2015
Traveling to the planet Jurassix to warn its inhabitants of an imminent comet strike, Geronimo Stilton and his crew encounter ferocious, dinosaur-like beasts who have an appetite for rodents.

Book 5

Rescue Rebellion

by Geronimo Stilton

Published 25 August 2015

Book 6

Underwater Planet

by Geronimo Stilton

Published 26 January 2016

Book 6

The Underwater Planet

by Geronimo Stilton

Published 26 January 2016
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! Can the spacemice keep the spacecats from stealing the treasure?

Book 7

Beware! Space Junk!

by Geronimo Stilton

Published 26 April 2016
"MouseStar 1 is surrounded by floating space junk! It's yucky--and dangerous. Geronimo Stiltonix tracks down the source of the junk and meets very wasteful aliens. Even worse, robots that the aliens threw away have started to rebel! Can the spacemice restore harmony before the robots take over?"--Page 4 of cover.

Book 8

Away in a Star Sled

by Geronimo Stilton

Published 30 August 2016

Book 8

Away in a Star Sled

by Geronimo Stilton

Published 30 August 2016
Spacemouse Geronimo Stiltonix's adventures are out of this world!
Each year on the Night of Dancing Stars, the elfix aliens distribute gifts to all the creatures of the galaxy. But this year, the holiday is fast approaching, and the spacemice discover that the elfix have all disappeared! Can Geronimo Stiltonix and his crew find them before their special night?

Book 9

SLURP MONSTER SHOWDOWN #9

by Geronimo Stilton

Published 31 January 2017
Geronimo Stiltonix and the spacemice are visiting a planet where the most delicious wild mozzarella grows. Yum! But the planet is plagued by the slurp monstera scary alien who wants all the mozzarella for himself! Can the spacemice restore harmony on this cheesy planet without getting slurped up themselves?

Book 10


Book 11


Book 12

Invisible Planet

by Geronimo Stilton

Published 30 January 2018
When the MouseStar 1 lands on a mysterious planet that appears and disappears on the radar, Geronimo and his fellow Spacemice encounter aliens.