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: Amazon won't tell you, and you will learn only after you pay for this Kindle title: it has no illustrations or photos and has regrouped the footnotes to the point of making them worthless. A very disappointing result for a fine book with great crime history relevance. This title should NOT be purchased for Kindle if you are expecting to receive an honest copy of the complete book! I will not trust other Kindle titles because unless you own a print copy of a Kindle title you will never know what was omitted, removed or edited to fit an obviously limted format.
Solution:
Negative