Karl N. Llewellyn (1893-1962) was one of the major figures in American legal thought and professor of law at Columbia Law School and the University of Chicago Law School. Frederick Schauer is the David and Mary Harrison Distinguished Professor of Law at the University of Virginia.
Important on several levels - biographical, historical, and jurisprudential - Karl N. Llewellyn's The Theory of Rules will immediately claim a place in the corpus of American legal theory. Llewellyn and Schauer have jointly produced an indispensable text. (Adrian Vermeule, Harvard Law School)