Empirical Legal Studies has arrived in EU law. The past decade has seen the publication of pathbreaking quantitative and qualitative studies, the creation of relevant thematic networks, and the realisation of large-scale empirical research projects. This volume explores the new movement. It features contributions penned by legal and political science scholars working or interested in the field. It is part handbook, for which scholars – experts and novices alike – can reach to get an overview of the state of the art. It is part manifesto, showcasing the need for and potential of this fast-growing area of academic inquiry. Finally, it is a critical reflection, assessing the challenges and limitations of Empirical Legal Studies in the EU context, as well as its interaction with adjacent disciplinary and interdisciplinary endeavours. The book captures the significant contribution which empirical legal research has made to the study of EU law, while facilitating an exchange about the way forward.