Colorado Parks & Wildlife Research Library

Young Will Parker and his companions make a perilous journey toward an outpost of freedom where they hope to escape from the ruling Tripods, who capture mature human beings and make them docile, obedient servants. Long ago, the Tripods -- huge, three-legged machines -- descended upon Earth and took control. Now people unquestioningly accept the Tripods' power. They have no control over their thoughts or their lives. But for a brief time in each person's...

The Animorphs and Ax have allies willing to fight against the Yeerk invasion now that Andalites have finally arrived on earth. But there are only four of them and they don't want to fight alongside humans. Ax must choose a side. His friends? His people?

Tobias and the other Animorphs discover that the Yeerks, a parasitic alien race bent on enslaving Earth, plan to test a device that could put an end to the Animorphs' fight against the Yeerks.

When the small community of Holliswood is thrown into chaos by the arrival of a terrifying outlaw who deliberately instigates problems for the purpose of filming his crimes for television, modern superhero Daniel X assembles an all-star team to help protect fellow citizens.

Ax and the Animorphs flee the Yeerks, who seek to find the blue cube that gives the kids the ability to morph.

Zara Cole may have finally met her match. Lifekiller--a creature that can devour entire planets--is spreading terror throughout the universe, and it seems nothing can stand in the monstrous god-king's way. Reeling from a series of battles, Zara and her wounded band of allies are going to need a strategy before they face Lifekiller again. Zara's street smarts may not be enough when their enemy could be anywhere, destroying civilizations and picking...

A story complemented by fun scientific facts and a do-it-yourself experiment finds young Zack working to protect his tiny alien friend, Amp, while struggling through a science-fair project and preventing an alien invasion.

"Twelve-year-old Gratuity "Tip" Tucci is assigned to write five pages on "The true meaning of Smekday" for the National Time Capsule contest, and she's not sure where to beging: when her mom started telling everyone about the messages aliens were sending through a mole on the back of her neck? Maybe on Christmas Eve, when huge, bizarre spaceships descended to Earth and the aliens - called the Boov - abducted her mother? Or when the Boov declared Earth...

Raised underground by a robot, twelve-year-old Eva Nine finally finds all she ever wanted in the human colony of New Attica, but something very bad is going on there and unless Eva and her friends stop it, it could mean the end of life on Orbona.

There are some pretty weird grown-ups living in Bailey Cit. But could the new school nurse really be a Martian trying to spy on the students at Bailey School? The Bailey School Kids are going to find out!