On the afternoon of February 21, 2006, Norbert Schild sat down at a desk in the reading room of the City Library of Trier, in western Germany, and opened a 400-year-old book on European geography. Working quickly, Schild laid a piece of blank white paper on top of the book, took a boxcutter from his lap, and discreetly sliced out a map of Alsace from pages 375 and 376. Schild hadn’t noticed that the desks of two librarians, who were normally tasked with locating books for readers, were raised about…
