Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: A classic of military theory

Musashi's treatise on combat is, in many places, a rather dry recitation on footwork. But it is also, in many places, a thoughtful critique of traditions that serve no practical purpose in real life, and the need to experiment, to learn, and to embrace those ideas or skills that allow you to truly succeed in real life. Not the most engaging or accessible text, but very interesting and fairly short.