I read it in high school, and again recently after studying kungfu for over 20 years. I must say it means much more to me now. It is one of those typical books written by an expert; you kind of have to know what he is talking about, to know what he is talking about. The recent version I read had a picture of Musashi standing calmly with his sword tip down. The caption read, "Musashi is open on all eight sides, there is no possible way to attack Musashi." It is the best pictorial representation of "no form" that I have ever seen, with a caption that sums up the central oxymoronic truth of the style. It is one of those things that is actually easier to do than explain. People think no-form is only for masters, but we do it every time we are not doing a martial art. The trick is doing it and doing a martial art at the same time
Josh