Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Provides Great Insight

After seeing the movie, "Iron Lady", I wanted to understand how Margaret Thatcher got into politics in the first place. This audiobook answered all my questions, plus provided interesting insight into Thatcher's political and social beliefs that were the basis for her actions. I just wish the audiobook was on disk instead of cassette. Indeed, I thought I was buying it on disk. Fortunately, my car is old enough that it still has a cassette player.