The book will appeal to all those interested in European administrative governance, political science and law. Soft law is a term applied to rules of conduct which have practical and legal effects, but no legal binding force. Whilst EU institutions have increasingly adopted soft law in recent years and national administrations frequently use such instruments, little is known about the role of EU soft law in courts, especially at national level.Drawing on evidence from France and Germany and from multiple policy areas, this book provides a systematic, comparative and longitudinal analysis of the judicial use of soft law in national courts. It compares the use of soft law over time, between countries, and finds significant effects on law, policy and European administrations.This, in turn, has important repercussions for the democratic legitimacy of EU policymaking.