The book was one of the best I've read in years. Could not put it down! Was so excited for the film. It is so different from the book. I literally had to shut the movie off it was so bad.
Deviations from the book (some of them)…
1. The song Daniel sings to Natasha in the book is "Take a Chance on Me" and in the movie it's "Crimson and Clover."
2. The lawyer's name was changed (no clue why) and his entire back story was changed! In the book he has a conflicted story that is very interesting, but they omitted it, making the film suffer for it.
3. SPOILER ALERT! In the book, it's 10 years before the main characters find each other again. It's on a plane and it's by another side character that had a very interesting storyline in the book. All of that was left out! In the movie, they meet 5 years later and it's quite frankly, uneventful.
4. In the book, Natasha is to be deported that night. Movie version carries it into the next day. Trust me, it makes a difference.
Just a few of the many, many deviations from the book to movie. Save your time.