Delan the Mislaid (The first book in the Children of Triad series)

Enslaved by Walker Teksan, a master of evil magic, Delan--raised among another race of beings--joins forces with the Aeyries to seek out the secret of its heritage and to protect the world from Teksan's diabolical schemes To the Walkers, Delan was a monstrosity, big and clumsy with odd growths sticking out of its back. Controlled by a cruel master, a sorcerer who practices dark magic to keep Delan his slave, Delan discovers new hope when, aided by Eia the Aeyrie, it goes through a metamorphosis that transforms it into the beautiful, winged being it was always meant to be. Learning the truth of its heritage may not be enough to save Delan and the entire Aeyrie race from Teksan and his diabolical plans for conquest.