The Hitman's Justice — Bob Moats

Dexter Nash woke one morning to find a surprise in his bed, a dead woman. He had no idea who she was, but he had to get rid of the body. He called another hitman friend and asked for his help. After further questioning, they found a reason for the body. It was a plot against Dexter. Much time is spent taking care of the problem ending in an all out hit on a biker gang. This is the third book of the series and is a novella, longer than a short story, but shorter than a novel.