Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Emperor's "Important" New Clothes?

I rate this book at minus 5 as well.It does not matter what you call it, the self-named "master" is still naked, with no clothes on.The author is apparently incompetent in math, probably a reflection of developmental arithmetic disorder. The obvious inability in forming any clear high-school level concepts indicates tremendous and unsumountable learning disabilities. These disabilities should be remedied by seeking helps from the professionals, and should not be "blamed" on the market "volatility", "dynamics", or "conspiracies".