- "Parthian and Sassanian Wars: Rome's Conflict with Iran from Crassus to Julian" (2010)
- "The Circle of Gaius and Plotinus: Plotinus's Moral Philosophy and Its Place in Third Century Neoplatonic Thought" (2015)
- "Plotinus's Philosophy of Soul" (2020)
- "The Philosophy of Plotinus: Selected Essays by John A. Buttrick" (2021)
Articles
- "The Platonic Element in Plotinus and Its Relation to the Neoplatonic One" (1999)
- "The Unity of Soul and Body in Plotinus" (2000)
- "Plotinus on Divine Union" (2001)
- "Plotinus's Vision of God" (2002)
- "The Soul and the One in Plotinus" (2003)
- "The Problem of Evil in Plotinus" (2005)
- "Plotinus on Human Freedom and Responsibility" (2007)
- "The Intellect and the Forms in Plotinus" (2008)
- "The Nature of the Soul in Plotinus: Its Ontological Status" (2009)
Other Works
- "Neoplatonism and the Philosophy of Plotinus" (video lecture series, 2011)