Librarians are “unreservedly” on the side of the reader, and often attempt to expand the reader’s interests and stretch his worldview. If you’re Amazon, you want to recommend books that people like, so they’ll come back. But if you’ve read Gone Girl, then Amazon is likely to recommend books that are very much like Gone Girl in all the best ways they can find. A librarian is likely also to recommend things very much like Gone Girl, but maybe she’ll also suggest books that are not exactly like Gone Girl and are more of a risk.” David Weinberger