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

Example Input: At 60 pages,this is over-priced and not a course for adults. As basic instruction for those 10 and under, it is probably okay. For anyone who even doodles while talking on the phone- forget it!
Example Output: Negative

Example Input: This book is not for everyone. It is extremely scary and disturbing. At the same time, it is a fascinating look at the police work and prosecution that brought the murderous Manson Family to justice. The book is hard to put down; the in depth discussion on presenting a criminal case in court and developing evidence to support the case is outstanding. The main complaint is that the book is a few hundred pages too long. The author seems a little too self-promoting, but then again he did get a prosecution on one of the biggest murders in history.
Example Output: Positive

Example Input: The story itself was interesting, but the book is not well written. The author pads out half her sentences with adjectives and adverbs that are meant to add feeling that she apparently doesn't believe the facts will convey. She also seems unaware of the many cliches she uses. A potentially compelling story, written in an irritating, amateurish style.
Example Output:
Negative