'No-one is better at explaining the nuance of international law while keeping an eye squarely on the details than Jan Klabbers. This new edition of his groundbreaking textbook is a terrific update to an essential book. The book charts the theories and assumptions that make up the international legal system while telling engaging stories about the histories and cases that constitute its practice. The combination is readable, informative, and unmatched among international law textbooks.' Ian Hurd, Professor of Political Science and Director of the Weinberg College Center for International and Area Studies, Northwestern University

'The new edition of this textbook offers well-organised and updated reading material, always with the author's signature combination of systemic rigour and political sensibility, liveliness and academic thoroughness. The textbook is highly recommended for an intelligent and contextualised introduction to international law.' Catherine Brölmann, Associate Professor of international law, Department of International Law, University of Amsterdam

'Refreshing and argumentative, but also clear and concise - this textbook is a must for those wanting to combine the acquisition of knowledge with a deeper appreciation of the disagreements and controversies that abound in International Law.' Nigel White, School of Law, University of Nottingham