Publications
- The Plague of War (Oxford University Press, 2017).
- Herodotus: A Very Short Introduction (Oxford University Press, 2011).
- Athens on Trial: Antidemocratic Tradition in Western Thought (Princeton, 1994).
- Herodotus "The Histories" (edited with Walter Blanco, W. W. Norton, 1992).
- Accountability in Athenian Government, (University of Wisconsin Press, Madison, 1982).
- De Vidua Christiana in Collected Works of Erasmus, 66: Spiritualia, University of Toronto Press, ed. John O'Malley, 1988, 178-257 and 319-331. Translation and introduction by Roberts, footnotes by Roberts and O'Malley.