Angels’ Blood by Nalini Singh

Vampire hunter Elena Deveraux knows she’s the best—but she doesn’t know if she’s good enough for this job. Hired by the dangerously beautiful Archangel Raphael, a being so lethal that no mortal wants his attention, only one thing is clear—failure is not an option…even if the task is impossible. Because this time, it’s not a wayward vamp she has to track. It’s an archangel gone bad. The job will put Elena in the midst of a killing spree like no other…and pull her to the razor’s edge of passion. Even if the hunt doesn’t destroy… Read more.