Frightful's Mountain (Prebound)
It is illegal to harbor an endangered bird, so when Frightful returns to Sam, the boy who raised her, he has to chase her away. Frightful doesn't know how to live alone in the wild, and she can't feed herself, mate, brood chicks, or migrate. She struggles to survive and gradually learns to enjoy her new freedom. But Frightful feels a bond with Sam that can never be broken, and more than anything else, she wants to return to him.