The world’s digital trove of knowledge isn’t terribly useful without mechanisms for searching and sorting the ethereal holdings. That’s the trick Amazon—and the other knowledge monopolists—have managed. Amazon didn’t just create the world’s biggest bookstore; it made its store far more usable, far more efficient, than browsing the aisles of a Barnes and Noble or cruising a library’s card catalog. And beyond that, Amazon anticipated your desires, using its storehouse of data to recommend your next purchase, to strongly suggest a course for navigating knowledge.