This volume is a tour de force, based on excellent research, and an important and well-timed contribution to the literature. Many leading authors in this volume offer a lot of food for thought to readers who want to make academic sense of diplomacy in the digital age. With state of the art and theoretically stimulating essays, and editors who have become household names in research on digital diplomacy, the Handbook will surely be welcomed by many researchers and students. As a just-in-time research effort on fast-moving technological change and the conduct of international relations , this is a superb guide, and the book deserves a second edition before the end of the decade.