Darker Angels (The Black Sun's Daughter #2)

In the battle between good and evil, there's no such thing as a fair fight.
When Jayné Heller's uncle Eric died, she inherited a fortune beyond all her expectations -- and a dangerous mission in a world she never knew existed. Reining in demons and supernatural foes is a formidable task, but thankfully Jayné has vast resources and loyal allies to rely on. She'll need both to tackle a bodyswitching serial killer who's taken up residence in New Orleans, a city rich in voodoo lore and dark magic.
Working alongside Karen Black, a highly confident and enigmatic ex-FBI agent, Jayné races to track down the demon's next intended host. But the closer she gets, the more convinced she becomes that nothing in this beautiful, wounded city is exactly as it seems. When shocking secrets come to light, and jealousy and betrayal turn trusted friends into adversaries, Jayné will soon come face-to-face with an enemy that knows her all too well, and won't rest until it has destroyed everything she loves most...