The contributors to this interdisciplinary collection of essays consider various aspects of accountability and legitimacy in the European Union. How open should the Union's decision-making be? What is the right balance between accountability and efficiency? Does the Union now need a formal constitution? How can respect for democracy, fundamental rights and the rule of law in the Union best be ensured? These are just some of the questions explored in this book. It will be of interest to anyone concerned with the future of Europe, from students and academics to policy-makers, and journalists.