Instruct: Classify Amazon reviews into positive or negative sentiment
Query: it may be free, but it's still not worth it

You may not have to pay for it, but you will never be able to have those hours of your life back. This is the worst book I've ever read. I enjoy reading stories written by third-grade students more than this.I was going to leave my copy in a coffee shop for someone else to have for free, but I know believe it is my responsibility to society to ensure that it is safely destroyed before it can cause any harm.