The super rich, thus, could be godsends even if the endowment couldn't single-handedly end all library funding woes. Let's not neglect brick-and-mortar libraries, essential as study havens and community centers and in countless other ways. But e-books could be spread around more efficiently than the paper variety. Furthermore, physical shelving costs are nonexistent, and library patrons can check out e-books on their own. No fines, either. That should delight low-income people — those most appreciative of library books and other items, according to a recent Pew survey.