The ConfessorMunich: The writer Benjamin Stern entered his flat to see a man standing there, leafing through his research, and said, "Who the hell are you?" In response, the man shot him. As Stern lay dying, the gunman murmured a few words in Latin, then he gathered the writer's papers and left. Venice: The art restorer Gabriel Allon applied a dab of paint carefully to the Bellini, then read the message thrust into his hands. Stern was dead; could he leave right