Instruct: Classify Amazon reviews into positive or negative sentiment
Query: THE BEST!

MY GOOOOD this is by far the best Heavy Metal history book ever, it's been written with such passion for the music that makes you want to buy every album by bands you've haven't heard yet. The explanation of why neither Zeppelin or Deep Purple are the fathers of heave metal it's great, and gives Black Sabbath full credit for creating this amazing type of music. Any metal fan should read this book.