This new textbook focuses on the law of the four freedoms of the EU, and is ideal for undergraduate courses covering the substantive law of the EU. Catherine Barnard outlines the core issues in an engaging and accessible manner, and includes case studies to illustrate and develop points, as well as invaluable diagrams and flowcharts to clarify the more complex areas of the law.After an introduction which questions the need for rules regulating trade and an overview of the different theories relating to market integration, Catherine Barnard moves on to examine customs duties, taxation, and the free movement of goods, intellectual property, and external relations. The book looks at the law relating to persons starting considering specifically the rights of workers, the self employed, companies and service providers. The section concludes with an examination of the rights of those included (citizens) and those excluded (third country nationals). Capital is the final freedom examined, along with economic and monetary union. The books concludes with a consideration of the issues relating to harmonisation.