Animorphs 15 - The Escape

Almost nothing could be as bad as finding out your mother is Visser One. The most powerful of all Vissers. The leader of the Yeerk invasion of Earth. But it happened to Marco. And even though he's been handling it pretty well, he knew there'd come a time when he'd have to face her again. Knowing that the Yeerk in her brain had taken his mother away.
So when Marco, the other Animorphs, and Ax discover that Visser One is overseeing a secret underwater project, they know they have to check it out. But Marco's not sure if this is a battle he'll be able to fight...

Animorphs 06 - The Capture

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.