The Diversion (Animorphs)

Everything the Animorphs have ever known is about to change... The Yeerks suspect that the socalled "Andalite Bandits" are human after all. And the Animorphs know it's just a matter of time before the Yeerks learn their identities and infest them...and their families. Something major has to be done fast. Because now, the Animorphs can tell you who they are--and that changes everything.