From the mighty halls of ancient Alexandria to the coffered ceilings of the Morgan Library in New York, human beings have had a long, enraptured relationship with libraries. Like no other concept and like no other space, the collection of knowledge, learning, and imagination offers a sense of infinite possibility. It's the unrivaled realm of discovery, where every faded manuscript or mighty clothbound tome might reveal a provocative new idea, a far-flung fantasy, an ancient belief, a religious conviction, or a whole new way of being in the world.