Geronimo Stiltonix takes MouseStar 1's broken computer to a distant planet to be repaired by a brilliant inventor, but pirate spacecats attack and steal the device, and the spacemice must retrieve it before the machine can be turned against them.

When a celebrated goldsmith from Hawaii creates a necklace for a famous actress, rumors that the necklace is about to be stolen prompt Geronimo Stilton's investigation to identify the thief.

With a garbage thief on the loose in New Mouse City who is stealing organic waste, Hercule and Geronimo enlist the head of the Recycling Center to help, then discover that the thief has good intentions.

"Geronimo takes a vacation to the Camel Oasis!"-- It was a cold winter in New Mouse City when my grandfather William Shortpaws decided to take the whole family on vacation! We all climbed aboard the cheese-colored camper and set off on a relaxing retreat. But we took a wrong turn and somehow I found myself trying to round up a caravan of spitting camels. Could I get them all back to The Last Resort Oasis?

Geronimo, Thea, and Trap are exploring a mysterious old castle built by the founder of New Mouse City. Can they unlock all its rooms and discover its secrets?

"The famous Chef Crouton is teaching a course at Mouseford Academy on healthy eating and the Thea Sisters are chosen to compete on a special episode of his TV show!"--

Geronimo Stiltonix and the spacemice follow a treasure map to the planet Aquarix, unlock a treasure chest of rare material that powers an entire underwater civilization, and prevent pirate spacecats from stealing the chest for themselves.

"Geronimo and Trap decide to start making organic honey with the help of some beekeepers. When the honey is ready, they face up against the evil Madam No."

"Tony Sludge and the Sewer Rats have turned day into night, and they want the sun to stay away forever! Now it's up to the Heromice and the mysterious new crime fighter Super E to stop them. But can Superstilton and his friends bring daylight back to Muskrat City before it's too late?"--Provided by publisher.