During the first three chapters I had to force myself to keep reading. I have issues with not finishing a book, and I was debating on the merits of this young adult novel. The main character was irritating at first because he was whining about being tired and makes the comment that he doesn't know how he'll deal with being worn out when he's old... "like when I'm thirty." After rolling my eyes and reminding myself that this was for young adults, I pressed on. After chapter four things started to improve and I actually started getting into the story. I think that a basic understanding of the Christian religion will help with understanding this story, but you don't have to be an expert since the author does a nice job explaining the different types of angels (which is a key piece of this story). The author doesn't pull any punches when it comes to the action either. Beware, if you're looking for a feel good book where everyone lives happily ever after, this isn't the book for you. All in all, I would say it's a fairly interesting read. Some of the dialoque seemed a bit canned.. but other than that, I'd say it's worth the time.