Sun Tzu on the Art of War
2500 year old military treatise still brings many lessons on strategy, tactics, planning and governing.
I'd realy recomend this book as only a way to see how little the thinking of humanity has progressed [the same goes for L. ANNAEI SENECAE EPISTVLAE MORALES AD LVCILIVM - strongly recommended])
Hi Girts ! I really have to get the Sun Tzu. A friend of mine who's into DSDM recommends it as well, so I'd think it has some relevance to Agile thinking... -- LaurentBossavit
You can download and print it. If You don't mind 100 year old translation http://www.kimsoft.com/polwar.htm
See also ABookOfFiveRings