I'm not sure if this one deserves two or three stars. The premise is interesting, although if I had known what it was about, I probably wouldn't have picked it up in the first place - the description of the book is woefully inadequate to the story.
Still, the world was interesting, and the foundational ideas of it are generally uplifting in a Christian, God's-looking-out-for-us-even-though-it-seems-like-he-isn't sort of way. I appreciated the concept that the Bible's meaning has been lost to interpretation, and some of the other ideas.
Still, it's the execution that leaves some to be desired. The story tears on quickly, but in a way that seems to leave very little chance for anything terribly unexpected to happen. There were no powerful twists, and although characters died, I never felt any real fear for the main characters. In that way, the story itself and the ending tight up almost too tidily. Side characters are used, but often not to very food effect. They come off less as people populating a full world and more as B-side television characters - he was a fan of telling what kind of person they were instead of showing. That brings me to my largest criticism of this book: it was set to be epic in scope, but much of the world-level shaking cleans up incredibly easily, and I always felt detached from the larger picture.
Smaller things bothered me too. There were a fair number of minor grammar mistakes ("she's six-years-old" comes to mind...) and large chunks of descriptive stuff that was auxiliary to the story. I understand explaining the history of a building, but he did it too often and again, not usually to good effect. I found the frequent scene changes jarring because sometimes he didn't give me a reference sentence for how the last scene transitioned into the next one. The main villain was a little cartoony, and I had a little trouble buying, by the end, that he was competent enough to champion his plan for world-destruction.
All of that said, the story was largely enjoyable. I don't feel like I wasted my time on it. It isn't a masterpiece by any stretch, but it has a pretty strong concept at its core, and characters who are interesting if not masterfully portrayed. I'd recommend it to someone who only dabbles in thrillers and likes a Christian message. I'd tell the author to keep writing - the writing isn't terrible, but it can only improve.