This book describes and analyses the Swedish legal rules and practices regarding jurisdiction, mutual legal assistance in criminal matters, extradition and the EU arrest warrant. The Swedish law and practice in international criminal law is particularly significant for two main reasons. It is a system which is both logical and coherent. It displays a considerable Germanic theoretical influence, but its sophistication is tempered by pragmatism, designed to facilitate ôuser-friendlinessö. Secondly, the Nordic countries, because of a common history, and shared language and cultural factors, have long had a very high and effective degree of cooperation in international criminal law matters.