I wish I hadn't read this book... but heard it, for this is a book that deserves the delight that comes from the immediate business of listening to sounds in the air rather than the abstracted business of reading marks on a page (or dulled spots on a screen).
In it, Walter Ong makes a valiant attempt to take us back to a time before text, to a place where we might imagine language as something heard and existing only in its moment, language as something without thee concept of words and letters to chop it up, language as something we hear without imagined structures learned from print, language as something replete with revealing repetitions to aid memory and understanding, something that values the familiar over the novel. He then slowly winds us forward, textual innovation by [con]textual innovation, to the edge of the cyber age, the next unwritten chapter along this vast track.
If you're a reader of books, I'm sure you'll be transported by this adventure beyond your cultural assumptions of what language is and can be. You may find yourself yearning for some of the human experience our world of convenient published accessible text may be denying us, or even hoping some of that experience is still available in specialist forms such as live performance, as I do.
Either way, you'll never hear a book like it.