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

This is the best beginners' language book I have ever found in any language. I like to learn a little of the language before I visit a country, and since I travel frequently, I have a lot of experience with beginning language books. I spent a month with this book before going to Norway. The lessons were enjoyable and well-presented. I was amazed how much grammar and vocabulary I could absorb in so little time. When I got to Norway, I was able to speak and understand a wide variety of phrases.