Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Couldn't put it down!

I started reading this book and just couldn't stop. The amazing thing about it is that it is a true story. The author is engaging and takes the reader with him as he explores and then masters the skills that most guys only dream about. If you have ever been just a little bit frustrated about how to interact with women, this book will really open your eyes.