The fourth edition of Public International Law provides a very readable, lively, detailed and easily understood introduction to the fundamental principles and structures of international law without compromising on analysis and depth of coverage. Whilst the traditional topics of public international law are central to this book, new developments including the impact of Kosovo's unilateral declaration of independence from Serbia, the fight against terrorism, the implications of cases currently pending before the International Court of Justice on State immunity and the exercise of universal jurisdiction by States are also detailed. In addition, new actors on the international stage such as non-governmental organisations, multinational corporations and terrorist groups, are identified, examined and commented upon. The entire stance of the book allows the reader to appreciate the historic perspective and the evolving nature of public international law. This fourth edition includes an enhanced layout and student-friendly features such as advice on further reading, highlighted cases, aides-memoire chapter outlines and summaries.