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: My wife and I built a hybrid timber frame home using this book as a guide. Although we have construction skills, this book was invaluable in guiding us through the process. We can't wait to build another. We highly recommend this book to anyone considering a timber frame house.
Solution:
Positive