Piotr S. Wandycz. The Price of Freedom: A History of East Central Europe from the Middle Ages to the Present. London and New York: Routledge, 1992. xv, 330 pp. $37.50. Georges Castellan. History of the Balkans from Mohammed the Congueror to Stalin. Translated by Nicholas Bradley. Boulder, CO: East European Monographs, 1992. vii, 493 pp. $56.00. Distributed by Columbia University Press. The Columbia History of Eastern Europe in the Twentieth Century. Edited by Joseph Held. New York: Columbia University Press, 1992. lxxiv, 435 pp. $29.95 cloth; $16.50 paper.