Skepticism

Ancient Scepticism (2008)
The Cambridge Companion to Ancient Scepticism (2010)
Skepticism in Philosophy: A Comprehensive, Historical Introduction (2020)
Greek Buddha: Pyrrho's Encounter with Early Buddhism in Central Asia (2015)
Pyrrhonism: How the Ancient Greeks Reinvented Buddhism (2008)
Pyrrhonism in Ancient, Modern, and Contemporary Philosophy (2011)
The Life of Cicero (2023)
Cicero: The Philosophy of a Roman Sceptic (2015)
Cicero's Practical Philosophy (2012)