Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great book

This book was recommended to me by a good friend. I knew next to nothing about the struggles that some people face with mental illness, and didn't think I would understand or get anything out of the book. Once I started, I couldn't put it down. I think I was done in three days. There is profound truth and wisdom in this book, and it deals with many things in addition to mental illness. Even though I'm done with the book, I still open it up to read a couple of my favorite "must says", the intro to each chapter, every once in awhile. The website, jeremysprophecy.com, goes along with the book and talks more about the beliefs that Jeremy, the main character, held. This was a great book.