Darkness Forbidden - Legends Of A Dark Empire, #3

Garek, an Amaki prince, never thought he could love a human until beautiful Atlantean noblewoman Kistalleh saves his life. Their people are enemies, yet together they overcome prejudice and hatred to form a bond that will last millennia and defy death itself. When fate rips Kistalleh from Garek's arms, his agony propels him into the far future, modern America and a reunion with the woman he loves.
But in her current incarnation, Kistalleh is terrified of him and Garek must fight a deadly enemy before he can win her trust. And her heart.