Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Horrible

I felt like this book was a total waste of money. I can't believe all the positive reviews about it are for real - it doesn't seem like anyone who has actually read it and who has also read any of the great "self improvement" authors could ever think this book was anything but a poor imposter. These folks gave it a good try, but they are just stating the obvious and repackaging very old, common practices of self-improvement. Even the title is silly - they tell you that working on yourself doesn't work when they have been working hard on themselves for decades!