Ok so I'm obsessed with the movie, it's one of my favorite movies of all time so naturally I had to read the book to see what was left out and changed. I can't really say the book is better then the movie honestly, I can't say the movie is better either, they're about equal. Though the book is much different then the movie. Here are some things I wish was in the book that wasn't, but was in the movie. One, I wish that the Hostage situation had taken place in the HUGE freakin rich people mansion isolated on a freakin mountain, in the book it was in a rich peeps development in one of the houses and I thought the mansion from the movie was much cooler. Two, I wish that Mars had a fetish for girls in the book, he did in the movie. I thought that was an important part in the movie and made the Mars and Jennifer relationship a highly climatic sidestory. I think that the fact Mars had that lustful desire for Jennifer in the movie sort of proved that he was indeed human and had a weakness and wasn't this immortal criminal, but in the book it seemed he had no weakness and I thought there should have been some sort of weakness. Ok now things that were in the book I wish were in the movie. One, the story behind Dennis and Kevin in the book I thought was important, because you actually end up feeling bad for them for what they've been through. You find out they've been through so terrible times and I don't blame Dennis for doing what he did. And he really did take good care of Kevin and that's not really shown in the movie well. Kevin had to follow Dennis around everywhere because he had no one else. And in the book it's shown that Dennis and Kevin were actually forced into the Hostage situation by Mars when in reality they never wanted it to get out of hand in the first place and because of that it ultimately lead them to their deaths. Two, the story behind the guys that took Talley's family hostage. In the book you learn more about them and what they're about and that they're just human as well and are just as scared as everyone else in the book. And that's another thing in the book you find out that EVERYONE is scared, every single person in the book is scared crapless and that was one element of it that made it a fantastic thriller. Three, the story behind the Smiths. In the book you learn more about the Smiths then in the movie, and Mrs. Smith is actually alive just in Florida visiting a relative at the time her family is taken hostage by Mars,Dennis and Kevin. And last but not least, you find out more about the famous Jeff Talley chief of police of the Bristo Camino Police Department. You learn more about his family, his weaknesses, his strengths and his fears. Though the movie did well representing Talley's mind and strategies. All in all, I absolutely love the movie and book and I would say more about it but this is a very long review lol I hope you enjoyed it. I give it an R rating and 5 out of 5 stars. It's the best thriller there is, you should read the book if not see the movie!