But so far the great e-book debate has barely touched on the most important feature that the codex introduced: the nonlinear reading that so impressed St. Augustine. If the fable of the scroll and codex has a moral, this is it. We usually associate digital technology with nonlinearity, the forking paths that Web surfers beat through the Internet’s underbrush as they click from link to link. But e-books and nonlinearity don’t turn out to be very compatible. Trying to jump from place to place in a long document like a novel is painfully awkward on an e-reader, like trying to play the piano with numb fingers. You either creep through the book incrementally, page by page, or leap wildly from point to point and search term to search term. It’s no wonder that the rise of e-reading has revived two words for classical-era reading technologies: scroll and tablet. That’s the kind of reading you do in an e-book.
... Indeed, the codex isn’t just another format, it’s the one for which the novel is optimized. ... But if we stop reading on paper, we should keep in mind what we’re sacrificing: that nonlinear experience, which is unique to the codex. You don’t get it from any other medium — not movies, or TV, or music or video games. The codex won out over the scroll because it did what good technologies are supposed to do: It gave readers a power they never had before, power over the flow of their own reading experience.