Bradford Perkins. The Cambridge History of American Foreign Relations. Volume 1, The Creation of a Republican Empire, 1776–1865. Warren Cohen, series editor. New York: Cambridge University Press. 1993. Pp. xii, 254. $24.95, Walter LaFeber. The Cambridge History of American Foreign Relations. Volume 2, The American Search for Opportunity, 1865–1913. Warren Cohen, series editor. New York: Cambridge University Press. 1993. Pp.xvi, 263. $24.95, Akira Iriye. The Cambridge History of American Foreign Relations. Volume 3, The Globalizing of America, 1913–1945. Warren Cohen, series editor. New York: Cambridge University Press. 1993. Pp. xii, 240. $24.95 and Warren Cohen. The Cambridge History of American Foreign Relations. Volume 4, America in the Age of Soviet Power. Warren Cohen, series editor. New York: Cambridge University Press. 1993. Pp. xiv, 283. $24.95