House of Diviners (The Diviners #1‪)‬

Kelsey Jackson Diviner is a shaman–a walker between worlds, a healer and protector.

But when she witnesses a gruesome attack on one of her own, she must become a hunter and track down the monster responsible for disturbing the delicate balance between the human and spirit worlds. 

In trying to navigate her day job as a therapist and help pain-in-the-ass ghosts cross over by night, Kelsey draws the attention of a clandestine paranormal society and a mysterious man who calls himself the black dagger god.
 
Set in modern-day Los Angeles, this urban fantasy unleashes a blend of magic and thrills.