The Elgar Encyclopedia of International Relations is a welcome aid to international relations scholars and a valuable addition to IR literature. It is timely in its coverage and extraordinarily wide-ranging in its topics. What is particularly striking about the volume is its breadth of scope. Those familiar with North American IR scholarship will find the topics they have long considered important. These include IR theories such as Liberalism, Realism, Constructivism, Feminism, and Foreign Policy Analysis.. Key actors are included such as states, international organizations, and non-governmental organizations. Key issues are represented, like power, anarchy, conflict, security, international law, diplomacy, and cooperation. However, the concerns of non-North American scholarship are also well-represented. Selections include those on the English School, critical theory, colonialism and post-colonialism, indigenous peoples, uneven and combined development, racism, sexual violence, resilience, and the like. Evolving concerns are found in the volume as well. Examples include challenges to academic freedom, artificial intelligence, cyber, biopolitics, the Chinese School, global health, the new right, quantum theory, and the future. Most of the selections are relatively brief (two-to-three pages in length), but they are dense in their coverage. They convey the most important aspects or developments in the literature being surveyed, and they include foundational examples of the relevant literature for further reading. As a result, this volume is essential reading for anyone wishing to learn more about global international relations scholarship, for those who teach IR courses at either the undergraduate or graduate levels, and particularly for those who wish to write an IR textbook that is not immediately outdated upon publication.