I love this article about ebooks and the nature of literature by Tim Parks:
The literary experience does not lie in any one moment of perception, or any physical contact with a material object (even less in the “possession” of handsome masterpieces lined up on our bookshelves), but in the movement of the mind through a sequence of words from beginning to end. More than any other art form it is pure mental material, as close as one can get to thought itself.
I continue to grow less and less inhibited about buying ebooks, I know that much.
Gravitropic 