Bill Martin is professor of philosophy emeritus from DePaul University.  He is aiming to go from retired professor to renewed philosopher, and also to devote a good deal of time to making music.  After twenty-eight years in Chicago, he now lives full-time in Salina, Kansas.  His most recent book is Ethical Marxism: The Categorical Imperative of Liberation.  He is also a musician, and recently released two albums of experimental music, Gravitas (Avant-Bass 1) and Terre de Bas (Avant-Bass 2).