‘In international legal thought and practice, the making as well as the implementation of treaties are often approached in a one-dimensional way, namely as exclusively falling within the domain of the executive’s foreign relations prerogatives. In his exciting new book, Lange reminds us of the limits of such simplistic way of thinking about international treaties and convincingly demonstrates the need to look at domestic parliaments’ and courts’ hold of the making and the life of treaties. In doing so, Lange provides the reader with a novel and insightful way to look not only at the making and the life of treaties but also at the relations between international law and domestic law.’