Angel's Light. Elemental Angels, #4

He never forgot that one night of searing passion. Now, he's finally found her, but she doesn't remember him-and she's working for his enemy. Drea Arnold is no stranger to the weird and unusual. After working as a lab technician for a highly secretive employer, she thought herself immune to surprises. That is, until a brawny military-style man with the looks and attitude to match follows her home from work one night, spouting nonsense about fallen angels and immortal mages.
The wickedly handsome man insists he knows her, but he's crazy-as crazy as the strange feelings he stirs inside her. It's been eons since Chrome laid eyes on Drea, and he's never forgotten her, even when he was exiled to the mortal realm. Her memory loss offers an opportunity for a second chance, but with her being as good as human and unknowingly working in the demon stronghold, would his revelations only bring peril upon her? Renewed passion for an undeniable hunger grows between them, even as the demons' latest weapon against the sentinel angels comes to light.
Fate has marked each of them, but it's only a matter of time before the truth shatters the mists of the past, and the demons come hunting for them both.