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

Example Input: I like the book Castle In the Attic because it was very adventurous. My favorite part in the book was when Mrs.Philips gave William a gift. Do you know what the gift was? Can you figure out what it is? I recommend this book because Castle In the Attic is a very exciting novel to read.
Example Output: Positive

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 text is the same as ever (I think), but the plates are markedly inferior to all previous editions. Had I known this ahead of time, I would not have purchased this volume.
Example Output:
Negative