I won this book in a contest and I have to admit that I did not like it at all. I did finish it, however, as I had read reviews and they made me want to see what I was missing.
Main reasons I disliked the book were as follows:
1) I did not like the characters. They did not seem like real people and the main character, Natalie, was just irritating. She kept whining about wanting to spend time with her daughter, but then kept whining about how much she didn't like watching her kid's movies or playing games with her kid. Sure, being a single mom is hard, but grow up already. Natalie kept complaining like a spoiled brat.
2) The plot wasn't unique in any way. I figured out the "twist" in the first couple pages.
3) The entire book was a rant about morality and the need to own a gun. I wanted to read a novel, not hear a sermon.
4) The non-editing really bothered me. There were so many mistakes that should have been caught by the editor, such as the use of the wrong tense, incorrect punctuation, use of the wrong word (eg. the word is beholden not beholding).
With all that being said, I did like the character of Sam. His backstory made his beliefs and actions believable and understandable. His character was another reason I finished the book, as I wanted to see what would happen to him.