Orality and Literacy: 30th Anniversary EditionWalter J. Ong's classic work provides a fascinating insight into the social effects of oral, written, printed and electronic technologies, and their impact on philosophical, theological, scientific and literary thought. This thirtieth anniversary edition coinciding with Ong's centenary year reproduces his best known and most influential book in full and brings it up to date with two new exploratory essays by cultural writer and critic John Hartley.