'Sun Pin Military Methods', translated by Ralph D. Sawyer. Sun Bin was another known strategist who lived during the warring states period. A partial text of his military manual was found in 1972 after being lost for 2000 years.
'War, Politics and Society in Early Modern China 900-1795' by Peter Lorge. A thin volume which explores the relation between war and society in China for 895 years.
'Soldiers of the Dragon: Chinese Armies 1500 B.C. - A. D. 1840' by C. J. Peers. An Osprey hardcover, being a compilation of three volumes which explores Chinese armies. Lavish illustrations.