Twisted Magic - Knights of the Twisted Tree, #1

His magic could heal anything--except a broken heart. The war is over, and Korin has come to Triome, the greatest city in the world, for a fresh start. But Triome holds its own dark secrets, and Korin may not have left all his enemies behind. A disease stalks the city, a disease made of magic that only a wizard like Korin can cure. But he can't fight it alone, and his new allies may not be as friendly as they seem.
Especially handsome Ádan, who awakens feelings and memories that Korin would rather have left behind, and whose smiling face may be hiding the darkest secret of all.