The Lost Prince (The Iron Fey: Call of the Forgotten #1)

Ethan thought he had protected himself from his older sister's world—the land of Faery. His previous time in the Iron Realm left him with nothing but fear and disgust for the world Meghan Chase has made her home, a land of myth and talking cats, of magic and seductive enemies. But when destiny comes for Ethan, there is no escape from a danger long, long forgotten.