Upon publication in 1922 her book, “Etiquette: In Society, In Business, In Politics and At Home,” topped the nonfiction bestseller list, and the phrase “according to Emily Post” soon entered our language as the final word on the subject of social conduct. Mrs. Post, who as a girl had been told that well-bred women cannot work, was suddenly a celebrity and an outstanding American career woman, a position she maintained throughout her lifetime. Her numerous books, a syndicated newspaper column, and a regular network radio program made Emily Post a figure of national stature and importance.