John Foster was tutorial Fellow of Brasenose College 1966-2005 and was then been an Emeritus Fellow until 2009. His research interests have been in the fields of metaphysics, epistemology, mind, and language. He is the author of <i>The Case for Idealism</i> (1982), <i>Ayer</i> (1985), <i>The Immaterial Self</i> (1991), <i>The Nature of Perception</i> (2000), and <i>The Divine Lawmaker</i> (2004).