At the same time, once digitized, books can be unraveled into single pages or be reduced further, into snippets of a page. These snippets will be remixed into reordered books and virtual bookshelves. Just as the music audience now juggles and reorders songs into new albums (or "playlists," as they are called in iTunes), the universal library will encourage the creation of virtual "bookshelves" — a collection of texts, some as short as a paragraph, others as long as entire books, that form a library shelf's worth of specialized information. And as with music playlists, once created, these "bookshelves" will be published and swapped in the public commons.