The Yeerks aren't playing around anymore. They are no longer hiding behind a "silent" invasion. And one of the first steps they've initiated is to take over the National Guard to prepare for all-out war against humanity. An all-out war against Earth.

Marco, the other Animorphs, and Ax couldn't be less prepared for this news. Because they know the Yeerks are onto them—and now they're in hiding. Things are falling apart, and for once Jake may not be able to make the decision that will save them. . . .