'The commentary that Greatrex has written is smart, comprehensive, and fills a giant gap in the field of Procopian studies in particular, but also, given the importance of Procopius' work, in the field of sixth-century history in general. It is a work of remarkable depth and breadth, by a scholar with a mastery of Procopius himself and of the modern scholarship on the historian. It deserves a place on the shelf of every serious scholar of Procopius and the sixth-century Mediterranean world.' David A. Parnell, Gnomon