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:
To read this book you need to be fully awake and have full concentration. This is not the type of book to bring to the beach. Though Richard Hofstadter makes a convincing case of what colonial times were like and he obviously was a scholar, he writes very monotonously. if not thouroughly interested in american history at 1750 i would not recommend this book. otherwise, if you are a history-fanatic, this book gives a wide range of perspectives and fully covers the history of the time.
Answer:
Negative