Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The most revealing book on the subject of past lives.

L. Ron Hubbard has created a text that reveals the dark mysteries of past lives. This book was fantastic and kept me reading for hours. I couldn't put it down. The true account of individual processed by Hubbard was very compelling. If you have ever wondered who you were in the past, this book is for you. A simply great piece of work.