Brownlie's Principles of Public International Law 9th Edition

Brownlie’s Principles has established itself as a book of real value and authority for students, academics and practitioners. ― Samuel Wordsworth, Cambridge Journal of International and Comparative Law (review of the eighth edition)

[T]his is a very impressive work, wide-ranging in scope and nuanced in content, just as one would expect … delivering what seems to be at the moment the best single-author English-language international law textbook. It is highly recommended, both as a student text and as a persuasive authority for the practice of international law. ― Martins Paparinskis, International and Comparative Law Quarterly (review of the eighth edition)