That Old Black Magic — Andrew E. Moczulski

Eric Margrave, monster hunter, has never pretended to be a good person. Nor a particularly reasonable one. And so, when a very pretty young witch asks him for help in protecting her coven from a mysterious assailant, he naturally thinks with his hormones and leaps on the case, regardless of the fact he may very well be defending them from someone just like him.

Of course, things are never as simple as they first appear. A remorseless and powerful enemy stalks him from the shadows, and they are NEARLY as aggravating as the old friends trying to help him with the job. Can Eric defeat deadly menaces, refrain from throttling obnoxious witches, and most importantly maybe actually get the girl this time?

What? It's been awhile.