Ahriman

Burk Arrmann finds himself in a dark, demented, demonic existence, being neither dead or living. The Demon of Chaos and Destruction, Ahriman, has taken Burk's existence to use in collecting souls of those who owe Ahriman for worldly favors. Burk finds himself killing Ahriman's minions in many perverse and demented ways. He himself is subject to pain and suffering in the realm of demons while also finding their sick dark humor of torturing the living to suit his demeanor. This is his forever, there is no escape and there are demons who wish to see him suffer for their own pleasure. It is one hell of an eternal existence for Burk, there is no way out.
This book has some strong language and describes some very dark, demented situations. If any of these are not to your liking, do not read this book.