1. Peoples and states the world over have entertained formal relations with one another since time immemorial. The norms, traditions and ententes that have over the ages developed from these relationships collectively constitute the core framework, that is: sources, of international law as we know it today. While classical publicists were largely aloof on the question of sources, an upsurge of interest and scholarly debates on the subject, which puzzlingly emerged amongst contemporary international lawyers at the close of the First World War in 1919, endures. The latest of this interest is expressed in a new book—The Oxford Handbook of the Sources of International Law edited by Jean d’Aspremont, Samantha Besson (hereinafter, Handbook).1

2. The volume is a monumental work that includes 52 articles from 56 contributors, covering a range of perspectives related to the sources of the discipline. The scope of the book is confined to the criticalness of sources to the discipline of international law, especially with regard to their practical functions and limitations. The book is the first of its kind not just because of its firm emphasis on sources of international law, but more so for assembling a wide range of juristic interpretations on the subject (natural law jurists, positivists, formalists, realists, and contemporary thinkers) into one compact volume.