My interests in Ancient Philosophy are fairly extensive: I read and study over the whole period, from Presocratics to Late Platonics. Most of my publications have come from the center of that period, specifically the Hellenistic era: Epicureans, Stoics, and Skeptics. But I have also published on the Presocratic Anaxagoras, and also translated a long treatise written by Simplicius, one of the last non-christian Greek philosophers, probably around 530 A.D. My most recent book treats the Stoics, and I am writing more on Plato these days as well.
My topical interests center around ethics, but extend fairly far from that center. The study of ethics in antiquity is always closely linked to theories of psychology and intentional action, and these in turn to theories about epistemology and logic. I have little taste for metaphysical questions narrowly considered, but show me how they make a difference to ethics or psychology and I am instantly avid for metaphysics.