On the 75th anniversary of the birth of the author of the Pulitzer Prize–winning novel A Confederacy of Dunces, John Kennedy Toole’s biographer Cory MacLauchlin, the writer of Butterfly in the Typewriter: The Tragic Life of John Kennedy Toole and the Remarkable Story of “A Confederacy of Dunces,” tells us about the warning signs that led up to the suicide of one of America’s strangest literary geniuses.