The thought of a book being a frivolous waste of money is astounding, but I completely understand that. I guess for me it's more of where that external fetish for the book as an object interacts with the book as a medium that is the most difficult to define. Specifically, its about defining the book as a physical gateway rather than just as symbolic stand-in for one, and a lot of it has to do with my personal view of the individual word and its role as a shared conduit. Oddly, this ties in with Sawdy's question about spoken word books and written books: to me there is no distinction as a medium between the two, even if the endpoints on each side are drastically different.