This first book in the relaunch of Cambridge Studies in International and Comparative Law addresses the institutional aspect of the law of international organisations. Dr Amerasinghe starts with a brief history of international organisations. In 14 substantive chapters he then deals with subjects such as interpretation, membership and representation, the doctrine of ultra vires, responsibility, liability of members to third parties, Internal Law and Employment relations, Privileges and Immunities, Finances, dispute settlement, and dissolution and succession. There is a full and detailed examination of the problems connected with each of these subjects. The primary object of the book is to discuss principles, but Dr Amerasinghe also studies the law and practice of different organisations, using a rigorous analysis of the material alongside his functional examination of the law.