Insidious Heart by A. K. Graves

Victor Crow is dead.
That poor little boy from the wrong side of the tracks died years ago, died at the hands of someone who should have loved him most, and in his place is a dark and twisted creature who enjoys death and everything that comes with it.
Some call him The Harvester of Bones, others call him The Ghost, but neither truly vindicate his self-serving existence.
The day he’s asked to take out a hit on the president of a MC that has been wreaking havoc on the Wulven Kings for decades is a day that forces him to change his line of thinking completely. He stumbles across a morbidly sexy little thing that he can’t seem to stay away from, but what happens when an obsession becomes more and The Harvester of Bones puts everything at risk for his only weakness?
Victor Crow is dead, but death won’t stop him from saving his sweet little dove, even if it means riding through the gates of Hell to do it.