This book provides an ambitious assessment of the increasing importance of case law in the field of the Area of Freedom, Security and Justice on the evolution of EU law. In recent years the Area of Freedom, Security and Justice (AFSJ) has occupied an increasingly prominent place in the working of the European Union and by extension the Court of Justice (CJEU). Over three parts the book looks at the framework of the AFSJ, its workings, and finally the impact of EU law upon it. The collection provides remarkable insights into the growing importance of the AFSJ and how EU law has evolved in light of this.