The questions at the core of this volume are the following: What are the ethics and integrity rules for the EU? How do they score compared to the integrity frameworks existing at the Member States' level and in other democracies? How do we design these rules and ensure their enforcement in the EU? How do we improve the enforcement of EU integrity standards? Can an EU ethics system contribute to preventing or mitigating unethical conduct within the Union thus improving its democratic legitimacy? In addressing these questions, this edited volume provides a critical analysis of the existing 'EU ethical framework' while contextualising it within the unique transnational setting that characterises the EU public administration and its various institutions.