American novelists and poets who came of age in the early twentieth century were taught to avoid journalism "like wet sox and gin before breakfast." It dulled creativity, rewarded sensationalist content, and stole time from "serious" writing. Yet Willa Cather, W. E. B. Du Bois, Jessie Fauset, James Agee, T. S. Eliot, and Ernest Hemingway all worked in the editorial offices of groundbreaking popular magazines and helped to invent the house styles that...