Killing Rites: Book Four of the Black Sun's Daughter by M.L.N Hanover

Jayne Heller inherited a world of magic and thought it was fun. Now she knows nothing is as it seems. Also she's possessed by a demon and has been for a very, very long time. Jayne hides out with her friend Ex hoping to find a way to exorcise the thing inside her skin. But once again, nothing is as it seems.

There's an unexpected enemy out there as well as betrayal and unlikely allies. Jayne must finally confront her secrets and the motives of her dead uncle. This is very good. There is a lot of peeling back of the layers of mysteries of this world. I hope there is a 5th book in the series as the world building is fascinating.

Best Line:
"I had the sense of something ancient maybe something that had been beautiful once but was all septic madness now."