This is the ideal text for general European courses at undergraduate level. It serves as a reference work for legal practitioners on points of principle. It presents detailed commentary on, and analysis of, the European Union and its substantive law. It covers the constitutional structure of the EU, examining the functioning of the institutions, the jurisdiction of the European Court of Justice, and the nature of the European legal order. It provides detailed coverage of the free movement of goods, persons and services, competition law, and state aids. It includes boxed summaries at the start of each chapter summarising the key points. It provides a list of further reading at the end of each chapter New for the 5th Edition. It includes new chapters on the Constitutional Treaty, Corporate Establishment and Cross Border Investment, Citizenship, Fundamental Rights, and the Charter of Fundamental Rights.