Hell Bound is part of Janet Morris' award-winning and best-selling Heroes in Hell series. See the Heroes in Hell series Wikipedia page: https://en.wikipedia.org/wiki/Heroes_in_Hell

About Hell Bound: Hell Bound - featuring Daemon Grim
(As introduced in Doctors in Hell )
In hell, none of the condemned believes they deserve to be there. And that’s fine, so long as they’re not foolish enough to try and do anything about it. For those that do, there’s always Satan’s Reaper–and chief bounty hunter–Daemon Grim.
Feared throughout the many layers of the underverse, no one in their right mind dares to cross him.
However, when Grim discovers that someone has attempted to evade injustice, and seems hell-bent on gaining access to ancient angelic artifacts proscribed since the time of the original rebellion in heaven, circumstances point to the fact they may be doing just that.
The question is...why?
Thus begins an investigation that leads Grim throughout the many contradictory and baffling levels of the underworld, where he unearths a conspiracy that is not only eating its way like a cancer through the highest echelons of Hellion society, but one which threatens the very stability of Satan’s rule.
As you can imagine, Grim’s response is bloody, brutal, and despicably wicked.

Hell Bound – In hell, everyone can hear you scream...