Given the task definition, example input & output, solve the new input case.
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Example: I've read this book with much expectation, it was very boring all through out the book
Output: Negative
Review writer does not like the book because it was boring, therefore it is a negative review.

New input case for you: This is by far his worst effort that I've read. He's not my favorite spy author,anyway. This book feels like it had been written to fulfill a publisher's contract or obligation that Mr. Higgins had assumed and needed to finish in a hurry. The characters are not at all fleshed out, and the story line is too contrived. I would advise not wasting time by reading this book.
Output:
Negative