science fiction

Three boys set out on a secret mission to penetrate the City of the Tripods and learn more about these strange beings that rule the earth. Sequel to "The White Mountains.".

Will and a small group of free people plan to destroy the three great cities of the Tripods before the arrival of a space ship destined to doom the planet.

The inhabitants of a disabled spaceship take steps to prevent the panic-stricken citizens of Sand Rock from thwarting efforts to repair their craft.

Rod has found his father but lost his own body to the villainous BKR, which leaves Rod sharing the body of a one-eyed blue alien named Seymour.

After crashing their spaceship in the Nevada desert, Klatu, Lek, and their sister Ploo go to Las Vegas in search of the one mechanic who can fix it.

Commander Salamander and his band of pirates capture the "Star Warts" spaceship, and Commander Toad is forced to hop the plank.

The reader's decisions control the course of an adventure involving a glowing mountaintop dome that may be from outer space.

The reader's decisions control the course of an adventure in which authorities fight the invasion of vampires from outer space.

Rachel and her friends run into a dying alien who gives them the power to morph into any animal they touch, placing the responsibility of saving the Earth from a silent, deadly attack completely in their hands.

When the Animorphs discover some strange happenings in the woods behind Cassie's house, they must stop Visser Three before he can destroy Ax's feeding grounds.