Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Is this politics or economics?

You can learn something from this book, but at a great cost. The writing is very poor and the message is tendentious. Lots of snide remarks about Ronald Reagan. Milton Friedman's name is usually accompanied by a phrase like "and his acolytes". Marx and Engels are cited in all seriousness as economists. As history, the book gives you a very distorted picture. A bad book.