The Hidden

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.The Yeerks have discovered and repaired a damaged Helmacron ship. They know of its morph-seeking capabilities, and they plan to use the ship to capture the Andalite bandits. And to find Elfangor's blue cube. The one that gave the kids the ability to morph.Cassie, the other Animorphs, and Ax are in a pretty bad situation because they can't leave the cube in one place, they can't morph without being discovered, and they have to keep moving. It looks like this may be a battle the visser can't lose. . . .