Enemies Within opens a new field of study. There are scant references to the bewildering phenomenon of fifth columns in the literature, but the contributors to this intriguing volume show the widespread use of 'fifth column politics' in many different historical and geographical contexts. They masterfully dissect the concept and provide impressive, rigorous, and very rich case studies.
Harris Mylonas is associate professor of political science and international affairs at George Washington University and editor-in-chief of Nationalities Papers.
Scott Radnitz is the Herbert J. Ellison Professor of Russian and Eurasian Studies in the Jackson School of International Studies at the University of Washington.