- Love, Friendship, Beauty, and the Good: Plato, Aristotle, and the Later Tradition
- Reading Plotinus: A Practical Introduction to Neoplatonism (History of Philosophy) (Purdue University Press Series in the History of Philosophy)
- Plato's Parmenides and Its Heritage: History and Interpretation from the Old Academy to Later Platonism and Gnosticism
- PLOTINUS Ennead VI.8: On the Voluntary and on the Free Will of the One: Translation, with an Introduction, and Commentary
- Plato's Parmenides and Its Heritage: Volume I: History and Interpretation from the Old Academy to Later Platonism and Gnosticism (Society of Biblical ... from the Greco-Roman World Supplement)