Grimaulkin

Treading the straight and narrow is not natural to one who summons demons.
Michael LeBonte is set free after five years in magic prison. All he has to do is stay on the straight and narrow path for the rest of his life. However, because he summoned demons to "take care of things," it's easier said than done.
Now his plan is to make a new life for himself. His sister has welcomed him back, he's met a cute guy, and he's found a nice job assisting the local private investigator.
But his expertise does not go unnoticed and he gets pulled back to do what got him sent to prison in the first place.