- The underwater planet, Geronimo Stilton ; illustrations by Giuseppe Facciotto (design) and Daniele Verzini (color) ; translated by Anna Pizzelli
- Away in a star sled, Geronimo Stilton ; illustrations by Guiseppe Facciotto (design) and Daniele Verzini (color) ; translated by Anna Pizzelli
- The great mouse race, [text by] Geronimo Stilton ; [translated by Julia Heim ; illustrations by Giuseppe Facciotto and Daniele Verzini]
- Alien escape, Geronimo Stilton ; [Illustrations by Giuseppe Facciotto and Daniele Verzini ; translated by Emily Clement]
- Thea Stilton and the great tulip heist, Thea Stilton ; [illustrations by Barbara Pellizzari (drawings) and Daniele Verzini (color) ; translated by Emily Clement]
- Cavemice, text by Geronimo Stilton ; illustrations by Giuseppe Facciotto (design) and Daniele Verzini (color) ; graphics by Marta Lorini ; translated by Emily Clement, 1
- Thea Stilton and the journey to the lion's den, [text by Thea Stilton ; illustrations by Barbara Pellizzari and Daniele Verzini ; graphics by Chiara Cebraro ; translated by Emily Clement]
- A mammoth mystery, Geronimo Stilton ; illustrations by Giuseppe Facciotto (pencils), Livio Carolina (inks), and Daniele Verzini (colors) ; translated by Julia Heim
- Ice planet adventure, Geronimo Stilton ; interior illustrations by Giuseppe Facciotto (design) and Daniele Verzini (color) ; translated by Lidia Morson Tramontozzi
- Don't wake the dinosaur!, Geronimo Stilton ; illustrations by Giuseppe Facciotto (design) and Daniele Verzini (color) ; translated by Lidia Morson Tramontozzi
- Shoo, caveflies!, Geronimo Stilton ; illustrations by Giuseppe Facciotto (pencils), Carolina Livio (inks), and Daniele Verzini and Valeria Cairoli (colors) ; translated by Julia Heim
- The galactic goal, text by Geronimo Stilton ; illustrations by Giuseppe Facciotto and Daniele Verzini ; translated by Julia Heim
- Beware! Space Junk!, text by Geronimo Stilton ; illustrations by Giuseppe Facciotto (design) and Daniele Verzini (color) ; translated by Julia Heim