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:
I was pleasantly surprised to find this book so readable- even by modern standards it is a good read, although the language in parts is somewhat old-fashioned, archaic even ..... but if you can deal with that, this is a good bet for anyone who would like a tale of England in the late 1600's... love, adventure, and even a little humor too!
Answer:
Positive