The Unknown

As a member of the Animorphs, Cassie is on a mission to save the world. She and her friends have discovered a power that allows them to transform into any animal they touch. Now they just need to learn how to use it wisely. When they learn of a new Yeerk plot, they know they have to intervene. Their plan involves an amusement park and a dangerous alien technology that could end the world as they know it. The mission is risky and they have to face their fears and uncertainties.