Challenges and Recusals of Judges and Arbitrators in International Courts and Tribunals examines one of the fundamental control mechanisms of international dispute resolution. In doing so, the book assesses procedures, standards and outcomes of challenges and recusals in some of the main international courts and tribunals, including the ICJ, ICSID, the PCA, the WTO, the Iran-US Claims Tribunal, the ICC and international criminal courts. The book analyzes specific grounds for challenges and how they are applied, while also presenting personal perspectives on challenges and recusals from the point of view of arbitrators and counsel. The book also examines regional differences in challenges and recusals. This unique approach allows a comparative view on both procedural and substantive issues, and also provides a clear and in-depth study of specific forums.