Caro has never revealed who his Simon & Schuster editor was, and when I ask him point-blank, he smiles firmly. “I’d rather not say. I’ve promised myself I’m not going to go down that road, and I never have.” (Gottlieb, in his memoir, was less discreet. It was Richard Kluger, who in 1973 quit editing to write books of his own, including the Pulitzer-winning Ashes to Ashes, a critical history of the tobacco business.)