Animorphs

When Tobias and his friends were given the power to morph, they were also given an important warning: Never stay in a morph for more than two hours. But Tobias broke the time limit, and now he's trapped in the body of a hawk forever.

Rachel and her friends have been given the power to morph into any animal they touch. So when Rachel starts to suspect that one of her school friends has fallen into the control of the evil Years, she knows just the way to find out the truth.

When Jake, Rachel, Tobias, Cassie, and Marco stumble upon a downed alien spaceship and its dying pilot, they're given an incredible power -- they can transform into any animal they touch. With it, they become Animorphs, the unlikely champions in a secret war for the planet.

Rachel and the other Animorphs have finally found the new entrance to the Yeerk pool and have figured out how to sneak in. But things get complicated, particularly when they get a chance to decide if they want to stay on Earth or go to another planet.

Rachel and her fellow Animorphs believe they have a real chance at defeating the Yeerks when they discover the location of the alien regeneration pool, but their plans are disrupted by an all-powerful Ellimist who offers them an opportunity to go live on another planet.

In an effort to help start a rebellion against the Yeerks on the Hork-Bajir home world, Cassie agrees to become the host for the persona of a dead alien.

Marco, having been given the ability--along with four other friends--to change into animals forms by an alien that wants help in stopping an invasion of the enemy Yeerks, is at first reluctant to become involved, but when he discovers that his mom, who he believed was dead, has been taken over by the Yeerks, he finds a reason to fight.

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.

Jake and his friends are given the power to morph into animals by a dying alien who tells them the Earth is under attack by the invading Yeerks, and they are called upon to test their new abilities almost immediately when they learn that Vissar Three, deadliest of the Yeerks, is after them.

While Jake and the other Animorphs try to stop Visser Three from reaching the Pemalite ship at the bottom of the ocean, they discover a strange underwater civilization.