Hannah advances a constructivist account of the role of NGOs in the EU’s trade policymaking process. She argues that NGOs have been instrumental in providing education, raising awareness, and giving a voice to broader societal concerns about proposed trade deals, both when they take advantage of formal participatory opportunities and when they protest from the streets and in the media. However, the book also highlights how NGO inputs are mediated by the social structure of global trade governance. Epistemes—the background knowledge, ideological and normative beliefs, and shared assumptions about how the world works—determine who has a voice in global trade governance. Showing how NGOs succeed only when their advocacy conforms broadly to the dominant episteme, this book will be of value to scholars and students with an interest in NGOs and international trade negotiations. It will also be of interest to policymakers, national trade negotiators, government departments, and the trade policy community.