The European Arrest Warrant (‘EAW’), the cornerstone of European criminal law, is twenty years old. This collection brings together the leading commentators in the field to assess its merits, successes and suggest improvements. Taking a holistic approach, it looks at the EAW from all the different perspectives of its operation. Discussions range from fundamental rights, to constitutional issues and questions of national diversity, and to the external dimension of the EAW. This is an important assessment of the EAW, destined to become the point of reference in the field.