The sciences are the perfect place to test bookless libraries, librarians say. In math, online books tend to render formulas badly. And those in the humanities, arts and social sciences still embrace the serendipitous discoveries made while browsing. Johanna Drucker, UCLA professor of information studies, moreover asks: "What version of a work should be digitized as representative? Leo Tolstoy's original Russian text? Or the Maude translation? Should we digitize the sanitized version of Mark Twain's classics, or the originals?"