He has published on eros and midwifery in Plato, on magic and cosmology in the "Mithras Liturgy," and on various topics relating to Orphism, including the Derveni Papyrus and the gold tablets. His Myths of the Underworld Journey: Plato, Aristophanes, and the "Orphic" Gold Tablets, was published by Cambridge University Press. His current research interests include the history of myth interpretation and the marginal categories of magic and Orphism within Greek religion. He is editing a collection of essays on the "Orphic" gold tablets, forthcoming from Cambridge and working on a study entitled "Redefining Ancient Orphism."