The Mighty Hunter: Lords of the Abyss, Book 1

Caderyn is the sexiest - and perhaps craziest - man Bridget has ever laid eyes on. He may have rescued her from death, but who's going to rescue her from him? With all the right moves, the man is a walking seduction that's too hard to resist. Sparks fly. Desires heat. But there's one small problem. He claims they're trapped in the lost city of Atlantes, living on a cursed island deep within the ocean.