Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
This is the thirteenth book in Terry Pratchett's series on the Discworld--a flat world, supported on the back of four massive elephants riding on the back of a planet-sized turtle, anything hilarious can happen here, and eventually does.Brutha is a novice in the temple of Om, and he thought that things were very settled. And then one day he actually heard the voice of Om. ("Psst!") It seems that true belief in Om has been declining for years, and as such his power has waned until he found himself trapped in the likeness of a tortoise! But this revelation is going to turn the entire church of Om upside-down...starting with Brutha.Overall, I found this to be an interesting book. As with so many of Terry Pratchett's book, this one is both entertaining and quite thought provoking. As an added bonus, this book marks the first appearance of the interesting History Monks!
Answer:
Positive