This book examines the role of public opinion in the European integration process, and provides a systematic insight into how people's European integration attitudes are structured, how they vary, and how they have very different determinants and behavioural implications. This book is essential reading for anyone interested in the timely issue of Euroscepticism and the challenges facing the European Union. De Vries presents a compelling new theory of Euroscepticsm, arguing that national institutions and policies provide an essential benchmark for citizens' views on the EU. She presents a wealth of empirical evidence supporting her arguments. This book will surely become the new benchmark for any future work on public attitudes towards the EU.