The thirtieth volume, Bridging the Baltic Sea: Networks of Opposition and Resistance during the Cold War by Lars Fredrik Stöcker, traces the origins, evolution, and goals of Polish and Estonian émigré activists in Cold War Sweden and their linkages with both the host and the homeland societies. The book highlights the transnational dimension of resistance and opposition to the Communist regimes in Central and Eastern Europe. The analysis of the constantly shifting, at times conspiratorial, and even subversive networks that transcended the Iron Curtain draws a line from World War II to the collapse of the Soviet Union, framing half a century of transnationally concerted political activism in a geographical context that has not received much scholarly attention. The book contributes to ongoing historiographical debates about the scope and extent of East-West contacts that developed underneath the radar of international diplomacy and to the question of the role, significance, and impact of émigré politics during the Cold War.