Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very good book. Recommended.

I once read a different book on the same subject, and it gave suggestions and advice based on the way things could be or should be. As a result, the advice and suggestions were mostly useless. By contrast, the basis of this book is the way things really are. This cold, hard reality might be too harsh for some, but the book won't steer you wrong. If you follow all the suggestions, even if you don't get a boyfriend, you'll be a better person.