The US led programme of extraordinary rendition created profound challenges for the international system of human rights protection and rule of law. This book examines the efforts of authorities in Europe and the US to re-establish rule of law and respect for human rights through the investigation of the program and its outcomes. The contributions to this volume examine the supranational and national inquiries into the US CIA-led extraordinary rendition and secret detention programme in Europe. The book takes as a starting point two recent and far-reaching developments in delivering accountability and establishing the truth: First, the publication of the executive summary of the US Senate Intelligence Committee (Feinstein) Report, and second, various European Court of Human Rights judgments regarding the complicity of several state parties and the incompatibility of those actions with the European Convention of Human Rights and Fundamental Freedoms (ECHR). The collective volume provides the first stock-taking review of the state of affairs in the quest for accountability, and identifies significant obstacles in going even further -- as international law demands. It will be vital reading for students and scholars in a wide range of areas, including international relations, international law, public policy and counter-terrorism studies.