L arry David agreed to this authorised biography with a five-word email: “Oh Jesus. If we must.” As Blake J Harris tells it, the comedy writer has always been adept at finding reasons not to do something, or to stop doing it, even when there’s nothing to fall back on. As a peppery standup in 1970s New York, David was notorious for storming off stage if the audience displeased him. He walked out of his first TV job, on the Saturday Night Live clone Fridays, because “I stunk.” He twice quit Seinfeld, the sitcom he co-created in 1989, over meddling by NBC executives and fantasised about the network giving him an excuse to leave for good. In 1992, just before it became the biggest show in America, he told friends, “Honestly, I would rather spend a year in prison than do another season of Seinfeld. It would be peaceful.…