Instruct: Classify a review into positive or negative sentiment.
Query: ABSOLUTELY ESSENTIAL

Big Al Pavlaw owned a record store in downtown Providence R.I. for many years. I purchased this book shortly after it's release in 1983. Extremely well done and as others have pointed out it fills a huge gap in the history of American popular music. This books not only covers doo-wop and R n B in the 1950's but also does a great job covering the black music of the 1940's. The only negative aspect is that the type is extremely small. But buy a magnifying glass and enjoy!