A Secret War: Americans in China, 1944–1945. By Oliver J. Caldwell. (Carbondale: Southern Illinois University Press, 1972. Pp. 218. $5.95.) - Dragon by the Tail. By John Paton DaviesJr. (New York: W. W. Norton & Co., 1972. Pp. 448. $10.00.) - General Stilwell in China, 1942–1944: The Full Story. ByChin-tung Liang. (Jamaica, New York: St. John's University Press, 1972. Pp. 321. $6.95.) - Sino-American Relations, 1949–1971. Edited by Roderick MacFarquhar. (New York: Praeger Publishers, 1972. Pp. 267. $2.95.) - Americans and Chinese Communists, 1927–1945: A Persuading Encounter. By Kenneth E. Shewmaker. (Ithaca, New York: Cornell University Press, 1971. Pp. 387. $10.00.)