I read the book. That alone made the movie terrible. But I would have been upset whether I read the book or not. The first thing I noticed was that, unlike the book, Vivian and Aidan were made to be incredibly lonely. The original Aidan had a mom, dad, and little sister - he had a ton of friends. The original Vivian is proud of her heritage and of her pack. They were high school teenagers, but they were pulled out of society in the movie and the creators of this movie did the same thing they did to Underworld. No one smiles. Ever. Everyone is lonely all the time. The entire screen is blue for the duration of the movie. The characters are empty. It's all about the woman with fangs and/or a gun. I hate that this book was reduced to that. I don't see what was wrong with the plot in the book that they had to tear it apart. They essentially took the names and changed everything else. And not even for a good reason... the plot they created was miserable.