The Lingering Dead — J.N. Duncan

She cracks the FBI's toughest supernatural crimes, from Chicago's windy streets and beyond, into the next world. But a malevolent force now has her reputation -- and her team -- in its sights...

Jackie Rutledge has faced down everything from the darkest sorcery to uber-vengeful revenants. But heading up the Bureau's special paranormal unit is presenting unexpected challenges. Handling otherworldly egos and politics has never come easy to this loner agent. And opening up to her sexy vampire lover, Nick, is as unnerving as her unwanted new ability to slip between the realms of the living and the dead...

Now an insidious power holding helpless ghosts in thrall is using any means necessary to discredit Jackie and split her team apart for good. The only chance she has means baiting the terrifying Deadworld being stalking her dreams, hunting her every step -- and growing ever more hungry for her ultimate sacrifice...