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.

Scholar Jules Addison and scavenger Amelia Radcliffe join forces to unravel secrets of a long-extinct civilization, only to discover something that could spell the end of the human race.

When a mission for Lady Proxima goes horrible wrong, Han and Qi'ra team with a Rodian scrumrat named Tsulo to escape Lady Proxima's wrath as well as the dangerous Empire.

When a little boy meets a stranded alien child, the two quickly become friends, but at bedtime, the alien suddenly grows very sad, and the boy tries to figure out what his new friend needs to be happy again.

At Camp Whatsitooya, twins Joules and Kevin and new friend Nelson face off against large, rabbit-like creatures from the Mallow Galaxy who thrive on sugar, but are not above hypnotizing and eating human campers.

In a future where alien beings consume technology as a few humans try to preserve it, Strata, her brother, and a friend are separated from their caravan and, with a wonderful robotic horse, must fight their way back.

Emperor Mollusk, ex-warlord of Earth, comes out of retirement to save the planet from the sinister brain's control.

Traveling to Cleanix to investigate why floating space junk has engulfed MouseStar 1, Geronimo finds that the planet's alien inhabitants are extremely wasteful and face the threat of rebellion by the robots they've thrown in the trash.

A plot to exterminate humans by a hostile group could be thwarted if extraterretrial human David Jacobs helps the U.N. in an escalating nuclear crisis.

Idris Telemmier has uncovered a secret that changes everything: the Architects' greatest weakness. A shadowy Cartel scrambles to turn his discovery into a weapon against these alien destroyers of worlds. But between them and victory stands self-interest. The galaxy's great powers would rather persue their own agendas than stand together against this shared terror.