Showing Black Magic Woman by Justin Gustainis

Occult investigator Quincey Morris and his "consultant", white witch Libby Chastain, are hired to free a family from a deadly curse that appears to date back to the Salem witch trials. Fraught with danger, the trail finds them stalking the mysterious occult underworlds of Boston, San Francisco, New Orleans and New York, searching out the root of the curse. After surviving a series of terrifying attempts on their lives, the two find themselves drawn inexorably towards Salem itself - and the very heart of darkness. Black Magic Woman marks the start of an electrifying news series of supernatural thrillers following the exploits of occult investigators Quincey Morris and Libby Chastain, as they search out evil in the darkest corners of America.
"Justin is a first class writer; he's smart and he's fun, he moves quickly and he takes corners at speed. Every time you think you know where he's going, he makes a point of going somewhere else. His characters are sharp and vivid, his dialogue crackles with wit and tension, and when it comes to the scarier corners of the magical underworld, he knows his stuff." - Simon R. Green, New York Times best-selling author of the Nightside series
Jim Butcher, author of the "Dresden Files" novels "'Black Magic Woman' is the best manuscript I've ever been asked to read. Keep your eye on Justin Gustainis."