Nah, I haven' t really read Go Rin no Sho? Although I' d really like to, some day. I' m just so hot on Yakuza, because the setting is a more real samurai enviorment, something you don' t see all that often, and the cast seems to be bishounen free which I consider a plus this time around.

I would' ve also mentioned No More Heroes, for the Wii, but this isn' t the first time I' ve seen it, there' s been trailers and screencaps of the game before.

Here you can read Go Rin No Sho for free
http://www.miyamotomusashi.com/gorin.htm
I don' t know how accurate it is though and there' s no explanations of the text either.
I' d recommend you to read Zun Tsu' s art of war here
http://www.sonshi.com/
which contains explanations and things like that.