K Applegate

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. When he discovers an important Yeerk secret, Tobias knows he has to do everything...

Marco never wanted to be an Animorph. He didn't want the ability to change into any animal he touched. And he certainly didn't want to be one of a handful of kids that are the planet's only defence against a secret alien army. His friends know why he feels the way he does. He's worried about his dad—the only family...