Allen F. Davis ; with a new introd. by the author Peter F. Drucker ; with a new introduction by the author. Robert M. Pirsig ; [with a new introduction by the author]. Norman N. Holland; with a new introduction by the author Paul Gilroy, with a new introduction by the author Andrew H. Knoll, with a new preface by the author Updated and with a new introduction by the author James B. Stewart ; [with a new afterword by the author]. Martha C. Nussbaum ; with a new afterword by the author. David F. Noble ; with a new preface by the author.