Claimed By the Dragon Prince

Aiden, a human prince, sails to the Dragon Kingdom for peace talks but is ambushed by Osmund and rescued by Ignis—the dragon prince he once saved—who keeps him on an island. Returning home, Aiden finds his uncle Mordred has seized the palace and is hunting him; he reunites with Ignis, and together they retake command of the capital guard. Forced to feign capture when Mordred threatens his parents, Aiden assassinates him and saves them—just as Osmund's dragon army arrives.