What would you do if you were the only alien trapped on a
strange planet? Probably freak out, right? Well, that's what
Ax feels like doing. But as an Andalite warrior-cadet, he has
to be pretty cool about stuff like that. He's been hanging out
with the Animorphs ever since the Dome ship was destroyed
by the Yeerks and his brother, Prince Elfangor, was
destroyed by Visser Three.

Life on Earth is pretty different for Ax. But there is one thing
he, Cassie, Marco, Jake, Rachel, and Tobias have in
common. Something that one alien, four kids and a hawk
know they have to do...stop the Yeerks...