Oxford Studies in Ancient Philosophy is a volume of original articles on all aspects of ancient philosophy. The articles may be of substantial length, and include critical notices of major books. OSAP is published twice yearly, in both hardback and paperback.'unique value as a collection of outstanding contributions in the area of ancient philosophy.' Sara Rubinelli, Bryn Mawr Classical Review | Oxford Studies in Ancient Philosophy XXXI by David Sedley, Paperback | Indigo Chapters