Instruct: Classify a review as either positive or negative.
Query: Don't waste your time

I picked up this book at a used book store for $5 and am still kicking myself for even paying that much for it. Short chapters that are heavy on humor and very light on anything useful. The advice in the self-defense section reads like it was written by someone with about six months of training in a storefront martial arts school who read a bunch of books by others who promote these shoddy types of techniques. Don't waste your time.