The Black Sun's Daughter series

 KILLING RITES (#4)

Jayné Heller has discovered the source of her uncanny powers; something else is living inside her body. She's possessed. Of all her companions, she can only bring herself to confide in Ex, the former priest. They seek help from his old teacher and the circle of friends he left behind, hoping to cleanse Jayné before the parasite in her becomes too powerful.

Ex's history and a new enemy combine to leave Jayné alone and on the run. Her friends, thinking that the rider with her has taken the reins, try to hunt her down, unaware of the danger they're putting her in. Jayné must defeat the weight of the past and the murderous intent of another rider, and her only allies are a rogue vampire she once helped free and the nameless thing hiding inside her skin.

Published November 29th 2011 by Simon and Schuster

UNCLEAN SPIRITS (#1) 

Jayné Heller thinks of herself as a realist, until she discovers reality isn't quite what she thought it was. When her uncle Eric is murdered, Jayné travels to Denver to settle his estate, only to learn that it's all hers — and vaster than she ever imagined. And along with properties across the world and an inexhaustible fortune, Eric left her a legacy of a different kind: his unfinished business with a cabal of wizards known as the Invisible College.

Led by the ruthless Randolph Coin, the Invisible College harnesses demon spirits for their own ends of power and domination. Jayné finds it difficult to believe magic and demons can even exist, let alone be responsible for the death of her uncle. But Coin sees Eric's heir as a threat to be eliminated by any means — magical or mundane — so Jayné had better start believing in something to save her own life.

Aided in her mission by a group of unlikely companions — Aubrey, Eric's devastatingly attractive assistant; Ex, a former Jesuit with a lethal agenda; Midian, a two-hundred-year-old man who claims to be under a curse from Randolph Coin himself; and Chogyi Jake, a self-styled Buddhist with mystical abilities — Jayné finds that her new reality is not only unexpected, but often unexplainable. And if she hopes to survive, she'll have to learn the new rules fast — or break them completely....

DARK ANGELS (# 2)

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....

VICIOUS GRACE (#3)
When you're staring evil in the eye, don't forget to watch your back ...
At Grace Memorial Hospital in Chicago, something is stirring. Patients are going AWOL and research subjects share the same sinister dreams. Half a century ago, something was buried under Grace in a terrible ritual, and it's straining to be free. Jayné is primed to take on whatever's about to be let loose.

Yet the greatest danger now may not be the huge, unseen force lurking below, but the evil that has been hiding in plain sight all along—taking her ever closer to losing her body, her mind, and her soul. . . .