Amidst a gripping account of his gig as a $90,000-a-year staff writer at The New Yorker, freelance writer Dan Baum discusses the magazine’s views on narrative nonfiction structure, as codified by a longtime articles editor there, John Bennett. In talking with Baum early in his relationship with the magazine about finding and writing a story from the Iraq war, Bennett advised him to make it a “process” story: “ ‘It’s a New Yorker standard,’ he went on. ‘You simply deconstruct …