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.