In his latest podcast , Infopeople's book maven Michael Cart talks about the fine art of the essay.
Mentioned in this podcast: Chris Baldick's The Concise Oxford Dictionary of Literary Terms; Joyce Carol Oates and Robert Atwan, eds. The Best American Essays of the Century; Gore Vidal's United States: Essays 1992-2000 and The Last Empire. Essays 1992-2000; Philip Lopate's Portrait Inside My Head and To Show and to Tell: The Craft of Literary Nonfiction.
Also mentioned: Phillip Lopate's The Essay, an Exercise in Doubt (New York Times. February 17, 2013); Eric Hoover's Two, Three Essays? More Can Be Less (New York Times, April 14, 2013).