I found this collection of essays simulating in many ways. Most importantly, it warns historians of antiquity that genre is not at all a simple heuristic tool that can be applied willy-nilly. The volume calls for the deconstruction of ancient genre in order to see its pervasive evolution as a pluriform phenomenon, influenced and often changed by means of hybridisation, reception, and modern ideological projections.
Geoffrey Greatrex, Hugh Elton, ed. Shifting Genres in Late Antiquity. Farnham; Burlington, VT: Ashgate, 2015.
From Bryn Mawr Classical Review (BMCR). Review by Chris L. de Wet, University of South Africa