Stefanie Posavec provides us with one more way of visualising language - well, actually quite a few ways.
The picture you see here, which has been exhibited at a number of art galleries, is an anlysis of Jack Kerouac's 'On The Road'. The "Literary Organism" represents simultaneously the basic structure of the book (as a tree structure), the length of sentences (as 'thickness' of strands), and the main themes and protagonists (as colours). And, IMHO, it looks lovely, too.
Posavec uses other methods and produces similarly strking work by representing other aspects of a literary piece. She has also worked on Darwin's "Origin of Species" and the lyrics of various albums.
You can find out much more on her home page.