`  == Adding the 20th Century reference ==  Please find below the references which auguments my edits to this page for the ``Rhetoric in the 20th Century``. I think ZMM is a very thoughtful work discussing on Rhetoric and a book with sufficient knowledge, references, analysis and research into rhetoric, this is why we would want to bring it explicitly under the 20th century works on Rhetoric.  Book: Zen and the art of motorcycle maintenance Author: Robert M. Pirsig Link:  Pages 76,78,81-89,95,103,105,117,162-176  Author: Catherine Rowett, University of East Anglia, School of Philosophy,  Book: Absolute goodness, rhetoric and rationality: a discussion of Robert Pirsig's novel Zen and the art of motorcycle maintenance and Plato's Phaedrus.   Author: Dr. Richard Cherwitz (Ph.D., University of Iowa, 1978)  Book: Rhetoric and philosophy    `