Dive into the critical role of trade unions amidst European integration. This essential work analyzes the social construction of organized interests, exploring how unions grapple with diverse member states to forge common political positions. Examining vital policy areas like freedom of services and minimum wage debates, it uncovers the realities of transnational cooperation and presents a robust theoretical framework. Essential for students, researchers, and professionals in political science, international relations, and labor studies seeking insights into global labor politics and European labor relations.