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Principles and Proofs: Aristotle's Theory of Demonstrative Science (Princeton University Press, 1992)

Philosophy Before Socrates, Indianapolis (Hackett 1994; second edition, 2011)

Simplicius, Commentary on Aristotle's Physics, book 8, chapters 6-10, translation and notes, in the series Ancient Commentators on Aristotle (Cornell University Press 2001)

Philoponus, Commentary on Aristotle’s Posterior Analytics, book 1, chapters 1-8 in the series Ancient Commentators on Aristotle (Duckworth Publ. 2008)

The Milesians: Thales (with G.Wöhrle) in the series Traditio Praesocratica (De Gruyter 2014)

"Anaximander's Apeiroi Kosmoi" in Essays in Ancient Greek Philosophy VI. Philosophy Before Socrates (A. Preus, ed., State University of New York Press, 2001)

"Zeno," in Cambridge Companion to the Early Greek Philosophers, (Cambridge University Press, 1999)

“Philoponus Account of Scientific Principles in his Commentary on Aristotle’s Posterior Analytics,” Documenti e Studi sulla tradizione filosofica medievale 20 (2009)

“The Place of the Posterior Analytics in Aristotle’s Thought, with Particular Reference to the Poetics,” in From Inquiry to Demonstrative Knowledge: New Essays on Aristotle’s Posterior Analytics (2010)

“Parmenides B38 and Cornford’s Fragment,” Ancient Philosophy 30 (2010)

“Philolaus on Number,” Proceedings of the Boston Area Colloquium in Ancient Philosophy 27 (2011)

“The Cosmogonic Moment in the Derveni Papyrus,” in Presocratics and Plato: Festschrift at Delphi in Honor of Charles Kahn, Las Vegas: Parmenides Press (2013)