Sons of Darkness - Gail Z Martin - Bog

We are the Night Vigil.
The run-down convenience store, the all-night diner, the last-ditch shelter, or seedy motel, the redneck bar and the emergency room, and all the other places open on the graveyard shift-they're Hell's hunting grounds, full of easy marks and desperate souls, prey for evil things out there in the dark.
We keep the Vigil, looking for the ones who can still be saved, the ones who aren't too far gone. We're the misfits and the muck-ups, unwanted by Heaven or Hell, given one last chance to atone for all the mistakes and missed chances, the pain we've caused others and ourselves, the good things we were afraid to do, and the bad things we embraced with open arms. We work the night shift because that's when evil walks. We're the clerk in the all-night liquor store, the server in the 24-hour diner, the long-haul trucker who only drives at night, the counter person in the convenience store, the dog shift nurse. We recognize the evil when we see it, and we use the skills we honed with blood and fire to stop it, whatever it takes.
Unfinished business ties us to the mortal world, to make atonement, find absolution, satisfy retribution, get things right. You won't find a sorrier group of halfway house heroes. No illusions left-about ourselves, humanity, or what's really out there in the darkness. Just a purpose, to go down fighting the good fight. Because this is our last chance.
One final chance to make it right, the thin red line of humanity against the evil that goes bump in the night, your best hope to make it through the hour of the wolf
When a series of disappearances, suicides, and vengeful spirits cause havoc and death along a remote interstate highway, demon-hunting ex-priest Travis Dominick teams up with former special ops soldier and monster-hunter Brent Lawson to end the problem with extreme prejudice.