Phantasma: The Awakening - Phi Athanatoi, #1

One night's transgression. A love unveiled. The in-escapable outcome of passion and vengeance. Carissa Alkippes is a daughter of a god, but she doesn't know it. As a cop she's seen her fair share of bad, but nothing prepared her for the horror of the world she has been plunged into. Xen Lyson is the head of the Phi Athanatoi, a group of immortals who have been protecting man for over 2, 000 years from the Kakodiamones - demons who want nothing more than to feast on humanity. Thrown face to face with Xen during a skirmish with the demons, Carissa becomes a pawn in a deadly game of a demi-god who seeks godly power.