Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not the best that's out

Yes, I spent a lot of $$$ on this book too and didn't really get anything useful out of it until I decided to check it out as a last resort for someone I've been searching for for years. Of ALL places he was listed in this book so it made the investment worthwhile, but I'll probably never need it for anything else. There are better books out there with the information most people will want.