That Mafioso Magic by Nicholas Bella

Private detective, Adrian Elias, knows what trouble looks like, and ruthless mobster and lion shifter, Sage Tamir, was just that with a capital T. On top of smelling like heaven, the man has the face of an angel, with a body made for unbridled sin. A combination Adrian finds very hard to resist.
​Unfortunately, someone is trying to kill Sage and they’re using magic to do it. Sage usually takes these types of matters into his own hands, but this time, he’s out of his league. He believes the only person who can help him is the down-on-his-luck detective. Problem is, Adrian doesn’t want to take his case because he feels it may be too dangerous. Never mind the volcanic-level attraction they seem to share for each other raising the stakes. Magic and mayhem awaits.