Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example: I've read this book with much expectation, it was very boring all through out the book
Solution is here: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Now, solve this: I've always been fascinated by the Manson family story...not in a sick and twisted way, but just the fact that one man had the power to control all of these people and could manipulate them to brutally murder completely innocent people for him for no reason. This book had so many details that I wasn't even aware of, and it made me feel like I was with the investigators and lawyers all the way from the discovery of the bodies through the trials. I would recommend it for anyone that is interested in this story.
Solution:
Positive