Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Book! MUST READ.

SNL, The First 20 Years is a 'must buy book' if you are a fan of the show. Not only is it interesting, it is informative too. Inside you can find out about musical guests, each cast member, and what a week in the life of SNL is like. Not to mention the best characters and sketches. Be sure to buy this!