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 in his power to destroy it. But to do so, he'll have to contend with a part of himself that's wrestling for dominion. A part that isn't human.

For Tobias, the fight against the Yeerks is more pressing than ever -- not just for humankind, but for his own humanity.

CHRIS GRINE is the creator of the Eisner Award-nomicated Chickenhare and Time Shifters. He’s been making up stories since he was a kid, and not just to get out of trouble with his parents. Nowadays, Chris spends most of his time writing and illustrating books, drinking lots of coffee, and sleeping as little as possible. He spends his free time with his wife, playing with his kids, watching movies, and collecting action figures (but only the bad guys).

K.A. APPLEGATE is the author of the bestselling Animorphs series, as well as the Remnants and Everworld series, Home of the Brave, and the Roscoe Riley Rules series. She lives in Tiburon, California.