Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ruined a wonderful book

Like many of the other reviewers, I am a huge fan of Ms. Coopers books and was excited to see a movie based on one of her books. Unfortunately, it was pretty much unwatchable. This review is on the first half of the movie, which I managed to force myself through. After that, I turned it off. From what I can see in the other reviews, that was a good choice.The movie has made unneccessary changes to the plot of the book. None of these changes improved upon the book; in fact, just the opposite is true. Further, the story was so condensed that it was almost impossible to follow. Special effects were over-the-top and completely distracting.I hope some day a good movie is made from the Dark is Rising series. Unfortunately, this is not it.