This book provides an analysis of the judgment of the Court of Justice of the European Union in the Pringle case. It focuses on the three main aspects of the ruling. First, it examines the part of the judgment concerning the validity of the European Council Decision 2011/199 - adopted under the simplified revision procedure (Article 48(6) TEU) - which provides for the possibility to establish a financial stability mechanism. Second, it evaluates the new rules developed by the Court in order to interpret agreements concluded exclusively by the member states, such as the ESM Treaty. Third, it...