Blood Trinity By Sherrilyn Kenyon & Dianna Love

Blood Trinity
All her life, Evalle has been straddling the line between human and demon. Curious about her origins, but content to live in the shadows, she finds that anonymity threatened by escalating conflicts between species. Accused of a savage murder, she's forced center stage in what seems like the beginning of an Atlanta apocalypse. Before long though, her personal problems will submerge as she learns startling facts about a hoard of supernatural terrorists.
The launch volume of a much-anticipated mass-market original paranormal romance series.