Princeton University Press has just released Greek Buddha: Pyrrho's Encounter with Early Buddhism in Central Asia, by Christopher Beckwith. I don't know the author, but he's clearly not a specialist in Pyrrhonism, so I wonder to what extent his comparisons are well supported. The problem with (most of the) papers and books comparing Pyrrhonism and Buddhism is that their authors are, as one would expect, specialists in only one of these subjects.
