Skippyjon Jones, the Siamese cat that thinks he is a Chihuahua dog, has an adventure on Mars.

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.

While waiting to leave Mars before it burns up just like the Earth before it, Liam and his friend Phoebe discover some facts about time and space and realize that the human race is just one of the races trying to survive in space.

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...

Twelve-year-old Alice Dare is one of 300 seven- to sixteen-year-olds evacuated to Mars to attend school and train as soldiers, safe from the war with Earth's invading aliens, the Morrors, but when all of the adults and robots mysteriously disappear, the youths must survive on their own.

Built to explore Mars, Resilience begins to develop human-like feelings as he learns from the NASA scientists who assembled him, and as he blasts off and explores Mars, Resilience must overcome different obstacles as he explores the red planet.

An English astronomer, in company with an artilleryman, a country curate, and others, struggle to survive the invasion of Earth by Martians in 1894.