Carlos Bosque Argachals book offers an exceptional and comprehensive analysis of the Single Supervisory Mechanism within the Banking Union. It combines doctrinal rigour with institutional insight, exploring the legal architecture, competences, and procedures that define EU banking supervision. A sophisticated and indispensable contribution to understanding the ECBs evolving role in financial governance. -- Pilar Perales Viscasillas, Commercial Law Professor, Spain Carlos Bosque Argachal offers a lucid and thoughtful exploration of the Banking Union and the Single Supervisory Mechanism. With analytical precision and a firm grasp of institutional practice, this book provides valuable and extremely well documented guidance to anyone seeking to understand the evolving relationship between supervision, sanctioning, and the rule of law in the European banking framework. -- Filippo Annunziata, Bocconi University, Italy and European Banking Institute, Frankfurt, Germany The reader of this book will find a valuable further contribution to the academic research relating to the Single Supervisory Mechanism (SSM) in the Banking Union. This is due to its excellent structure, the proper in-depth analysis of the relevant provisions of the Treaty and (mainly) the secondary legislation, the thorough discussion of the related case-law of EU Courts and the extensive bibliographical references. -- Christos V. Gortsos, National and Kapodistrian University of Athens, Greece