An enviable achievement, Porter’s book recognises slavery as a legal institution and, at the same time, eschews a monolithic picture of what slavery entailed from the point of view of both exploiter and exploited. This book should be consulted by anyone who desires to know what slavery at Athens was in the period of history we can best document, how it functioned, and how it shaped the economy. Methodologically rigorous and evidence-based, it shows, like Lewis’s, that slavery was not monolithic and that its forms varied considerably. Porter is never doctrinaire and is ready to nuance his discussion as and when the state of the evidence does not permit definitive conclusions, or where the picture that emerges is not always clear-cut. His book is a welcome addition to the Edinburgh Studies in Ancient Slavery series.