I found the entire story line gripping and enthralling. With an unexpected twist at the end, how could you go wrong? Peretti wove an amazing tale that was clean, yet exciting! I'm the type to go for action/horror books. Behind the book was a moral backbone, with the conclusion of the book being that God will give us the courage to face virtually anything.
There wasn't a whole lot of negative-thank goodness! The violence level was a little high. I felt that he handled it well seeing as how it is a horror/suspense book. There was some killing (by the Monster) but was handled well and not dwelt on. However, the Monster did kill quite a few people. I say this only as a warning for those who prefer to read books without violence.