I think it goes without saying that this is a fantastic book. Unusually for me, I saw this movie several years before reading the book and as such, ruined the experience of reading this for myself. Anyone who has either read the book or seen the movie will know that this book contains an INCREDIBLE twist. One that you do not see coming but that literally takes your breath away. The only reason I didn't give this 5 stars is because I knew what was coming, but like I said, that was completely my own fault. I listened to this as an audio book and the narrator was fantastic. The tension is built in all the right places, to the point where I was certainly terrified at times. A really great read but I completely urge people to read the book before seeing the movie. Excellent!