The Advanced Introduction to the Law of International Organizations gives a nuanced overview of the legal mechanisms behind the operation of international organizations such as the UN, the EU and the World Bank. It offers perceptive insights by placing the law of international organizations in a political context and provides systematic discussion of a variety of relevant legal notions, ranging from the powers of international organizations to mechanisms of accountability. Written by a leading authority on the topic, it provides a concise and accessible examination of this developing facet of international law.