From a New York Times obit by James Ryerson headlined “Harry G. Frankfurt, Philosopher With a Surprise Best-Seller, Dies at 94”:

Harry G. Frankfurt, a philosopher whose fresh ideas about the human will were overshadowed in the broader culture by his analysis of a kind of dishonesty that he found worse than lying — an analysis presented in a bluntly titled surprise best seller, “On Bullshit” — died in Santa Monica, Calif.