This textbook offers for the first time a comprehensive analysis of the classic doctrines and main areas of international law from a European perspective, meeting the needs of the many European law schools teaching public international law in English. Special attention is devoted to the practice of the European Union, the Council of Europe and European States - both civil law and common law countries - with regard to international law. In particular the book analyses the interplay between international law, EU law and national law in the case law of the Court of Justice of the EU, the European Court of Human Rights and national jurisdictions in Europe. It provides the reader with insights into how the international law practice of the EU and its Member States impacts the development of international law, both in terms of doctrines such as treaty-making and customary law, the exercise of (extraterritorial) jurisdiction, state responsibility and the settlement of disputes, as well as in particular sub-fields of international law, such as human rights law and international economic law. In addition the book also covers other important areas such as the use of force and collective security, the law of armed conflict and the law of international organizations.