Books like The Ultimate by Katherine Applegate
The war between the Yeerks and the Animorphs escalates, forcing Cassie, the other Morphs, and Ax to confront new threats to their families and the free Hork‑Bajir. With the Yeerks proving too powerful to face alone, they debate whether to increase their numbers. Remembering the trouble caused by the Animorph who turned bad—David—they must weigh the risks of adding new allies against the need for more support.
First publish date: 2001
Genre: Children's Fiction/Children's Adventure
Authors: Katherine Applegate
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