Instruct: Classify Amazon reviews into positive or negative sentiment
Query: What does RS know about jazz?

A useless book that gives out 5 Stars as though it is water. Unbelievably uncritical, this book will not steer consumers to the very best work of an artist. Stick with the Penguin guide. It isn't perfect, but its vastly superior and pretty consistent regarding giving higher grades to the better albums and lower grades to the truly lesser works.