Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Much more powerful than the movie

I started reading this book one night, and couldn't put it down for hours. It's full of information, and really makes you think, no matter what your point of view. It's also very moving; some parts brought me to tears. Although I saw the movie a couple of years ago, it had much less effect on me than the book did. Highly recommended!