Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book changed my life!

Well,it wasn't just this book. The book it self is good, entertaining and very useful. But it was the fact that it lead me to Ross Jefferies that made the big changes in my life. The man is a true master in a brain science and getting laid. My friends and I were idiots till we found this stuff. Now were nailing your wife while your at work!