This new edition provides the definitive, comprehensive and systematic analysis of the law governing the EU's action in the world. Updated to take into account the Lisbon Treaty, the book covers all constitutional aspects of the EU's international action, the procedures for treaty-making, the relationship between the EU and its Members, with emphasis on mixed agreements, the relationship between EU and public international law, the EU and international organisations such as WTO and ECHR, and the EU and economic relations generally. It also covers the EU's links with its neighbours and with developing countries, sanctions, the Common Foreign and Security Policy, and the Common Security and Defence Policy This new edition is the most up-to-date work of its kind, examining both the law and practice in a wide range of external policies, placing the law in its political and economic context and exploring the links between the EU's external and internal actions. The book will be of interest to academics, practitioners and students of EU law, politics and international relations.