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

Example Input: This book contains such advise as writing down personal affirmations which you will repeat to yourself at the beginning of each day:I am calm, prepared, and entertaining.I am fit and beautiful.I am humble, patient, and compassionate.I am enough, just the way I am.If this kind of advise is your cup of tea, then this is your kind of book.
Example Output: Negative

Example Input: As well as a trilogy that is as far-reaching as it is set in a far-distant time with characters and galactic backdrop unrivaled by any other book. Definitely one of the great science-fiction classics just like "Stranger in a Strange Land", "Childhood's End", along with modern-day cyberpunk like "Neuromancer", "Count Zero", "Prey", "Cryptonomicon", "Snow Crash", "Darkeye: Cyber-Hunter", etc.
Example Output: Positive

Example Input: This book is a great read, a lot of fun. I'd recommend it to anyone who likes the genre. On the down side, I think that Gault is a little too evil -- he borders on the implausible with his ability to be one step ahead of the game. Also, I think Cornwell needs to develop Dr Kay a bit more; she's a good character, but needs more depth
Example Output:
Positive