It was really bad when Jake found out his older brother was
one of them. It was even worse when Tobias stayed in his
morph too long. But nothing compares to the horror the
Animorphs are about to face. Nothing.

Jake, Rachel, Tobias, Cassie and Marco have a feeling they
know where the Yeerks' new base is located. And they've
even figured out how to get in -- how many people notice a
few flies on the wall?

But they never figured they might get caught. Or that Jake
could fall into the Yeerk pool. That Jake
could become a human controller. A Yeerk.

The enemy.