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

Example input: I've read this book with much expectation, it was very boring all through out the book
Example output: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: It is hard at first to keep all the characters straight but it was a good book. The portrayal of a working first time mom and the two different worlds is insightful. There were a couple surprise twists.
A:
Positive