A young colonist on Mars befriends a strange round creature called Willis who gets him into trouble when he goes away to school, but whose presence and friendship finally enable the colonials to negotiate a treaty with the Martians.

A small mouse and his best friend, a giant flying robot, attempt to save the Earth when an evil Martian monkey and his mechanical creations attack.

After heroically saving his classmates, fifth-grader Sawyer's life as a dinosaur-human hybrid has gotten a lot easier until Sawyer, Sylvie, who is part Martian, and Elliot head to Mars in search of Sylvie's missing dad and discover that Mars is trying to kick Pluto out of the solar system.

When he takes a ride in a UFO to meet Janet, the head alien, Rappy must decide whether to live with her on Mars or return home.

Michael Prasad knows he shouldn't go out on the Mars surface alone. It's dangerous. His parents have forbidden it. And the anxiety he feels almost every time he puts on a spacesuit makes it nearly impossible for him to leave the safety of the colony. But when his best friend, Lilith, suggests they sneak out one night, he can't resist the chance to prove everyone--including himself--wrong. As the two ride along the Mars surface in a stolen rover, miles...

Everything Durango has ever valued, from Mimi, the sarcastic artificial intelligence implanted in his brain, to his beloved lieutenant, Vienne, to his own life may be at risk when his father, Lyme, tries to force him to become the Prince of Mars.

Pelly feels miserable because she looks different from her Martian classmates, but a glamorous opera singer who visits her class shows Pelly that her differences make her special.

Bell has spent his whole life--all eleven years of it--on Mars. But he's still just a regular kid-he loves cats, any kind of cake, and is curious about the secrets the adults in the US colony are keeping. Like, why don't have contact with anyone on the other Mars colonies? Why are they so isolated? When a virus breaks out and the grown-ups all fall ill, Bell and the other children are the only ones who can help. It's up to Bell--a regular kid in a...

When Nergil's first-grade class concentrates on health and fitness during Martian Health Week, he is very nervous about doing poorly in the upcoming space race.

While dreaming of being a spy like those in his favorite magazine, twelve-year-old Edward has been stuck holding his eccentric family together but when his parents are kidnapped, he leads his sisters and cousin in an effort to rescue them across the danger-filled landscape of nineteenth-century Mars.