First I just want to say that this edition contains The Book of Five Rings, but also The Book of Family Traditions on the Art of War by Yagyu Munenori. I thought I was worth mentioning!

The first book (Book of Five Rings) is the better one, but both present various thinking on the mindset and the «art» of martial arts/fighting, in duel style or in a more military approach, which can also be apply in a personal life, by the philosophical aspect of it all. I was expecting maybe more of the philosophy, when it's truly battle based, but I like it a lot. If you're into samurai, zen, art of war and stuff like that this is definitely a classic that you need to read!