The twenty-seventh book, Dynamic Détente: The United States and Europe, 1964-1975 by Stephan Kieninger, examines how the East-West détente in Europe emerged in the late 1960s and early 1970s and evolved over time.   Kieninger contends that U.S. and West European policymakers pursued the rapprochement with Soviet-bloc states because they believed that a more stable situation in Europe was a prerequisite for far-reaching change in the Communist societies.  Although Western leaders did not anticipate the sorts of drastic changes that occurred at the end of the 1980s when Communism in Eastern Europe collapsed, they did hope and expect that the détente in Europe could contribute to liberalizing changes in the East-bloc states.