Now this is interesting. I hope other readers will want to react to this.
And perhaps you can elaborate Kenneth?
I no longer have a copy of the book at my disposal, only a few scribbled notes. But from the opening chapter the spectre of an other-worldy being is ever-present. Sheriff Bell's opening monologue makes reference to a killer who was so strange and new to him that "maybe he was some new kind" [of person]. A few lines later: "But he wasn't nothin compared to what was comin down the pike."
You've got a 36 year veteran Texas sheriff, a WW2 vet (the Greatest Generation) who flat-out quits in the middle of the biggest crime investigation of his life. His exit lines include "prophet of destruction." Immediately, with the use of the word "prophet" the reader is put on notice that a higher, spiritual being (not the good kind) may be at work.
Near the end of the book Bell says "he's a ghost and he's out there." Another quote: "...if he is a man."
This is a pretty tough guy, has seen a lot, is dug in with his home, his wife, an anchor in the community. Yet suddenly he can't get out of town fast enough. It's fear of the Devil. A man like this doesn't cut and run from another human-- he's convinced that his very soul is about to be snatched and devoured.
But this is from the Ed Tom Bell Monologue/Diary. The actual third-person narration of the book portrays Chigurh, I think, as an obsessed mass-murderer who is very human.
I need some help here because I am always guilty of ignoring the importance of style and how it becomes part of the fabric of the story. And since I don't have a copy of the book at hand maybe someone could find examples where the physical atmosphere around Chigurh would suggest a supernatural presence.