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.
Jake's great-grandfather has died. It blows the family away - especially Jake's mum. So Jake's parents decide they should all travel to the great-grandfather's home to help with any arrangements. In another state. For three or four days. This is a very big problem for Jake's brother, Tom. He can't be away from the Yeerk pool for that long. So Tom refuses to go - and his father insists. But Tom's Yeerk will do anything to survive. Including making his father less of a problem.
Now Jake, the other Animorphs, and Ax have to find a way to protect his father without Tom discovering their secret. And without having to choose between his father's life . . . and Tom's.