The Soul Hunters
There are two stories, a novelette, "The Soul Hunters," and a short story, "Secrets of a Psycho."
The Soul Hunters is about a man who dies and goes to "the other side." The other side is nothing like he imagined, and it is a very dangerous place. He finds that he must be constantly on the alert for and avoid The Soul Hunters.
Secrets of a Psycho, is about a deranged serial killer.