Butler Library remains at least partially open 24 hours a day during the academic year. Several books and screenplays have been written within its walls, including Nobel Prize-winning novelist Orhan Pamuk's The Black Book and the script for the film Capote. It also plays a role in Paul Auster's 2009 novel Invisible, where the novel's main protagonist, Adam Walker, takes a job as a "page" in the library's stacks. This section of the novel is set in 1967 when the stacks were closed to library users. The page's task was to retrieve requested books from the stacks and re-shelve returned books. Along the front and sides of the library are inscribed the names of Homer, Herodotus, Sophocles, Plato, Aristotle, Demosthenes, Cicero, Virgil, Horace, Tacitus, Saint Augustine, Aquinas, Dante, Cervantes, Shakespeare, Milton, Voltaire, and Goethe.