While the internal market has been at the heart of the European project from the very beginning, it has rarely been the subject of sustained and comprehensive scholarly examination in its entirety. In the face of profound legal, political and policy pressures, this timely Research Handbook reflects on the cutting-edge issues, horizontal themes and the big questions which illuminate the shape of the internal market. It places the law and policy of the internal market within the context of the financial crisis and the existential questions this has raised for future European integration.In a departure from existing literature in the field, expert contributors approach the four freedoms as a functional whole and identify horizontal and overarching themes that have emerged over the years. The Research Handbook on the Law of the EU's Internal Market addresses six overarching themes: the reach of the internal market, the relationship between economic and non-economic interests, the internal market as an economic union, uniformity versus diversity, the governance and politics of the internal market, and the internal market in the world.This perceptive Research Handbook will be fascinating reading for academics and students in EU law and European studies. It will also be an invaluable resource for practitioners, policy makers, and anyone interested in the future of the internal market in particular and European integration in general.