  Philodemus’ philosophical projects, and the sweep of his argumentation, are not, however, confined to the level of individual books. Besides self-contained, single-volume (‘monobibloi’) works—e.g. On the Stoics, On the Good King according to Homer—a large number of books belong to multi-volume projects. Thus we have only the fourth—probably final—books of On Death and On Music; On Signs III; On the Gods I and III; Books I, II, III, IV, VI, VIII, and perhaps also VII of On Rhetoric. In no case can we be sure that we have the entirety of any such project, though there are perhaps signs in some bookrolls that they were meant to be the last in a series, as at the end of On Music IV, while in other cases, the nature of the treatment seems to bring the subject to a conclusion, as in On Death IV.