The Familiar - Animorphs, #41 Author:K. A. Applegate Jake seems to have grown up overnight -- literally. He goes to bed as his usual kid-self and wakes up ten years older to find the world completely taken over by Yeerks. All the other Animorphs are either dead or Yeerk-infested, and Jake alone is left to fight. Is it all just a horrific dream, or has the Yeerk invasion truly succeeded?