I'm reading this at the moment. A personal research and
understanding of Bushido, and also about the Edo (Sengoku,
Azuchi-Momoyama) period (jidai) in Japan. It's pretty much a
sourcebook/history book of sorts.
The Art of the Samurai - Yamamoto Tsunetomo's
Hagakure
Synopsis (Source)
Three hundred years ago, the former samurai Yamamoto
Tsunetomo wrote Hagakure, a masterpiece on the art and values of
these much-revered Japanese fighters; ever since, warrior chiefs
have preserved it as a moral and practical treatise for themselves
and their samurai retainers.
Once closely guarded and shown to just a chosen few, it is
now available to us all in this visually breathtaking new version.
Whereas Machiavelli’s The Prince shows how to succeed amid
treacherous political intrigues and Sun Tzu’s The Art of
War reveals battle strategies for bloodless victory,
Hagakure offers fascinating insight into Japanese
“warrior-ness”—a mindset steeped in Zen-Confucian philosophy.
Yamamoto Tsunetomo tells his readers how to foster courage, serve
selflessly, become a skilled master of your own destiny, and infuse
life in the here and now with beauty—while still acknowledging its
transience.
His timeless wisdom and profound aphorisms reflect important
principles that still apply to life today.
Gonna take me awhile. 
