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

[EX Q]: 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.
[EX A]: Positive

[EX Q]: The book I downloaded on my Nook and Kindle doesnt seem like the same one I read in school. This version Bored me to tears.
[EX A]: Negative

[EX Q]: Don't waste your hard earned money on this. Instead buy the REAL thing, "Let There Be Light", by Darius Dinshah. Nothing else to say. Rip Off of Darius Dinshah's father's works!!!!!!!
[EX A]:
Negative