Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Okay... For the Basics

I would suggest this book, along with the others of the Black Medicine series, to anyone interested in self-defense. However, I would also point out that self-defense is a way of life, and not just something that can be simply picked up from a book. Read this book, practice the techniques inside alone and with a friend, and find a self-defense class (no, not a one night class, but as a student), and you will learn how not to get killed in a violent confrontation.