Dominick Dunne began telling his tale of Gary Condit, Chandra Levy, the horse whisperer and the Middle Eastern procurer sometime in the fall of 2001. It was tantalizingly baroque; Mr. Dunne, the Vanity Fair columnist, mesmerized a group of New England newspaper editors with it over lunch at Foxwoods Resort Casino in Connecticut in November 2001. He also spun the story for Laura Ingraham, the lawyer, conservative commentator and syndicated radio host, over lunch. Ms. Ingraham promptly invited Mr. Dunne to repeat it on her show, which he did. As chronicler of the crimes of the rich, Mr. Dunne has...