The enormous renewed popularity of Sun Tzu's The Art of War has heightened awareness of the great Chinese tradition of writing on the theory and practice of war. Among other significant work is this 4th century B.C. study by the purported great grandson of Sun Tzu. It both extends Sun Tzu's strategic philosophy and develops it into a new style. Divided into 33 sections, it covers such topics as unfavorable terrain, the origins of war, 'guest' and 'host' armies, the 10 strategic uses of cavalry, and more.