We have four main sources on the interpretation of myths by the Neoplatonists: Porphyry's exegesis on a passage of Homer's Odyssey, Sallustius' On the Gods and the World, Macrobius' Commentary on the Dream of Scipio, and Proclus' Commentary on Plato's Republic (by far the longest of the four). This Commentary is not one of Proclus' better-known works, but it is nonetheless a crucial text. Sheppard's book studies two of the Commentary's dissertations, both vital to one's understanding of Proclus' philosophy of myth. This aspect of his thought is not often written about, mostly because it is presumed to be unoriginal; it is in fact multi-faceted and very personal, tying with many key elements of the Neoplatonic tradition (the positive use of mania, the importance of mysteries, rites and theurgy, hierarchical levels of knowledge, etc.). Sheppard first analyzes the form of these two essays, and then the fundamental issues they raise: Proclus' possible debt to his master Syrianus; his interpretation of Plato; the link between the allegorical interpretation of myths and mysteries. Some familiarity with ancient Greek helps, but it is not absolutely necessary. This is the only book-length study on this particular facet of Proclus' thought, and on his seminal Commentary; it is a very helpful tool for those who wish to pursue studies on such a topic.