Xenophon's Poroi (or, Revenue-Sources) was the final work of this renowned Greek author's large and varied output, written in the mid-350s BCE at a time when Athens had failed to prevent the collapse of her second Aegean 'empire', and was impoverished and demoralized in consequence. Framed by a General Introduction and the first-ever full Commentary on the work in English, this new and unprecedentedly accurate translation offers an authoritativeyet accessible overview of the text, its context, and its historical, socio-political, and economic implications that will be invaluable both to students new to the work and to more experienced scholars.