The Capture (Animorphs, #6)

We can't tell you who we are, or where we live.  IT's too risky and we've got to be careful.  Really careful.  So we don't trust anyone.  Because if they find us...well, we just won't let them find us.  The thing you should know is that everyone is in really big trouble.  Yeah.  Even you.

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 that Animorphs are about to face.  Nothing.

Jake, Rachel, Tobias, Cassie, and Marco have a feeling they know where the Yeerks' new bace is located.  And they've even figured out how to get in-how many people will really notice a few flies on the wall?  But they never figured that they might get caught.  Or that Jake could fall into the Yeerk pool.  That Jake could become a human-controller.  A Yeerk.  The enemy.