Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Great Book on the Nature of Light

I've had this book for years now, and it's one I always go back to time and again. The ideas it presents about the nature of light and its potential for healing and rejuvenation are startling. The main theme of the book is an amazing meditation technique that is taught over a seven day period. It involves learning how to "see" light and use it for healing, relaxation, energizing the body, etc. It's one of the best techniques I've used. Mr. Pepper writes as if he's sitting with you in your living room. He has a witty, engaging style, and he encourages readers to approach light meditation at their own pace, without the heavy esoteric tone of some other books. But he also outlines the meditation process thoroughly, and I for one found it extremely effective. I give it a definite 5 stars.