Instruct: Classify a review into positive or negative sentiment.
Query: don't... just don't

I bought another one of his books (not this one) so for full disclosure I am guessing this one will be similar to the one I bought on breaking. I have been practicing and teaching martial arts for 20 years now and I am always trying to increase my knowledge base. This series of books are a COMPLETE waste of money. They aren't even good for a beginner to buy. Please don't waste your money!