Anna, Ax, and the Animorphs go down into the hell of the Yeerk pool. Anna finds out who Visser One is ... and why not to swim there. In the Yeerk pool. Anna is more than a match for the Animorphs. And she is a Yeerk ... the enemy.

Her name is Anna. We can't tell you her last name. Because she knows. *Everything*. Then a spaceship tracks the Animorphs while they're morphing. The secret is out ... but whose?

Anna is in the hospital, but not for long. Her 'aunt' and 'uncle' are moving her back in with her 'parents'. She is already a member of the Sharing where she lived. Almost a full member. A full member is a Yeerk. Maybe the end of the Animorphs...

Stryke is living with two other people in her head, and none of them can agree on anything. So, naturally, they want their own bodies, and their own lives. But as the saying goes, you have to be careful what you wish for ...