Grayling lectured in philosophy at Bedford College, London and St Anne's College, Oxford, before taking up a post in 1991 at Birkbeck, University of London, where in 1998 he became reader in philosophy, and in 2005 professor. In addition to his work on Berkeley, philosophical logic, the theory of knowledge, and the history of ideas, the latter including (as chief editor) the four-volume "The Continuum Encyclopedia of British Philosophy", he wrote and edited several pedagogical works in philosophy, including "An Introduction to Philosophical Logic" (3rd ed., 1999) and the two volumes "Philosophy: A Guide Through the Subject" (1995) and "Philosophy: Further Through the Subject" (1998).