After Herzog came out, Saul Bellow began the slow transformation from young Bellow into old Bellow, from the critically adored but little-known writer to the Nobel Prize winner whose views were solicited on every topic. In The New Yorker, Louis Menand writes about a new biography of the author, which tackles his early career. Related: our own Emily St. John Mandel on Bellow’s novel The Bellarosa Connection.