Instruct: Classify a given review into positive or negative sentiment.
Query: I owe a lot to Roy Valentine !

This book is the most fun and educative one that I have read in recent years. I randomly picked it up and now it's my dictionary/manual. I wonder how Roy have collected so much knowledge in one life and put all of it together in a nice way. Roy, I wish that I was able to read your book 15 years ago, when I was a teenager. All my life I sadly listened to my friends sexual adventures hoping that they were mine. Now it's the other way, thanks to `The System'.Every word and instruction in the book is more than perfect. Sometimes being over confident about myself, I deviated from the rules that Roy listed and guess what I was badly shot down. So my sincere advice is just to follow every rule and just the way he said.Now you know why I said that I owe a lot to Roy Valentine.