This thoroughly revised second edition provides an advanced analysis of EU criminal law as a structurally and constitutionally distinct policy area and field of research. EU criminal law is one of the fastest evolving and most challenging fields of law and this Research Handbook contains new and substantially updated chapters to assess recent legislative developments and CJEU case law. Bringing together a diverse array of leading experts, the Research Handbook delves into key topics such as the normative legitimacy of EU criminal law, e-Evidence Regulation, and data protection, as well as the less visible effects of AI and mass surveillance. Engaging both theoretical and practical perspectives, the Research Handbook also surveys the external dimension of EU criminal law. The Research Handbook on EU Criminal Law continues to be a fundamental resource for students and scholars of law; in particular, EU criminal law, international law, procedural law and constitutional and administrative