Simon Thorn has only recently discovered that he's an Animalgam, a member of a secret race of people who can shift into animals, and found a home where he truly belongs at the Animalgam academy. But not everything is as good as it seems. Simon's evil grandfather, Orion, is bent on taking over the entire animal kingdom, and to do so, he'll need to gather the pieces of a terrible weapon--one that could shred the very foundations of the Animalgams' world. . . unless Simon can gather the pieces first.

And that's not all. Orion has kidnapped Simon's mother, and if Simon has any hope of rescuing her, he'll need to head cross-country with his friends, battling rogue Animalgams and their own doubts along the way. With dangers around every corner, it will be harder and harder for Simon to keep Orion from succeeding in his plot before it's too late.

This exhilarating story is packed with action, adventure, and characters full of heart, making it perfect for fans of Rick Riordan and Brandon Mull.