is based on an exceptionally wide range of research methods, including statistical analysis, participant observation, and interviews with EU-level, national, and local trade unionists and works councilors. It also draws on a wide range of European, German, French, Italian, and Swiss union documents and a multilingual body of academic literature across several disciplines, including political science, sociology, and law. Erne's multilevel inquiry goes beyond country-by-country comparisons of national cases and his book will prove of great relevance to readers interested in the future of labor, social justice, and democracy in an increasingly integrated world.