A mecca of sorts for the antiquebibliophile, Ars Libri maintains the largest stock in America of rare and out-of-print books on art. This business has books, both old and new, on topics as diverse asclassic modernism, German expressionism, Russian constructivism, architecture, post-war modern --and a variety of other "neo"'s and "isms'-- all in the modern, open space.