A book on Bushido, the old way of the samurai, as created in conversation with an old master-turned-monk.
In a time when the others were softening up, a samurai who had lost his master and left to live in a monastery spoke in hushed tones to a friend about the old ways he grew up in. Although he and others insisted the manuscripts be burned, the promises were broken when they were kept secret. They would be later compiled and published, and even later translated from its original Japanese.
A particularly interesting book. Although most of it is definitely not directly-applicable today, I think anyone who already has a sufficient "wisdom" (whatever that means) will find bits and pieces of insight.
- Properly titled Bushido - The Way of the Samurai