Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The Complete Idiot's Guide to Geocaching

I felt duped. I knew it was used, but I did not know it was old, 6 years old. Statistics were not current. I would not have been interested in this book had I been aware that it was that old. It may have been a "complete" guide when it was written, but it certainly is not today.