Animorphs Boxed Set 10 Books 3740 Author:Katherine A. Applegate The story of five humans, Jake, Marco, Cassie, Rachel, and Tobias, and one alien, Aximili-Esgarrouth-Isthill (nicknamed Ax), who obtain the ability to morph into any animal they touch. Naming themselves "Animorphs" they use their ability to battle a secret alien infiltration of Earth.