I like Jack Reacher style characters regardless of setting. Put them in outer space, in modern America, in a military setting, on an alien planet... no worries. Book has non moralistic vigilante-justice? Sign me up! (oh, I read urban fantasy, soft and hard sci-fi, trashy vampire and zombie novels too)
I'll start with the good points: the narrator is consistent and the first 5-6 hours of the story are quite engaging.
Then the religion comes in... but it's not really religion, it's some sort of demon possession mish-mash. This would have been ok, if it had been blended in as part of the story, but it becomes the whole story after the 6 hour point. No more detecting, no more solving, no more chasing, just lots of "in-my-head dealing-with-possession" type of silliness - long passages of descriptions of "Evil" as an entity.
It's like a thriller/detective story crossed with a bad horror book, but it's not scary, just sorta silly. Demon possession? Sure... but not with characters that ALL act outside of normal parameters. A serial killer might behave like this, and, maybe, so would an experienced FBI investigator having a breakdown, but would a forensic pathologist and a lawyer ALSO behave so abnormally? Naw...
I waffled between 2 and 3 stars because, essentially, the last 4 hours of it are junk even though it starts with such promise.
This book was a bit far fetched yet predictable. It was "okay" but not one of the better books I've heard. By the end, in the "scariest" parts, my friends and I were laughing at how ludicrous it was. I'm sure that was not the author's intent.