By the time the series aired in 1978, Adams says, he had put about nine months’ solid work into it and had been paid one thousand pounds. “There seemed to be quite a long way to go before I broke even,” so he accepted a producer’s job at the BBC but quit six months later when he found himself simultaneously writing a second radio series, the novel, the television series, and episodes of Doctor Who. Despite this remarkable workload, he was already building a legendary reputation for not writing. “I love deadlines,” he has said. “I love the whooshing noise they make as they go by.”

Success only added to his ability to prevaricate. His publishing editor, Sue Freestone, quickly realised that he treated writing as performance art, and so she set up her office in his dining room. “He needs an instant audience to bounce things off, but sometimes this can weirdly backfire.

“There was a scene early in one book when he talked about some plates with, very definitely, one banana on each. This was obviously significant, so I asked him to explain. But he liked to tease his audience and he said he’d tell me later. We eventually got to the end of the book and I asked him again, ‘Okay, Douglas, what’s with the bananas?’ He looked at me completely blankly. He had forgotten all about the bananas. I still occasionally ask him if he has remembered yet, but apparently he hasn’t.”

Writer and producer John Lloyd has been a friend and collaborator with Adams since before Hitchhiker. He remembers the “agonies of indecision and panic” Adams got into when writing. “We were on holiday in Corfu with three friends when he was finishing a book, and he ended up taking over the whole house. He had a room to write in, a room to sleep in, a room to go to when he couldn’t sleep, and so on. It didn’t occur to him that other people might want a good night’s sleep as well. He goes through life with a brain the size of a planet, and often seems to be living on a different one. He is absolutely not a malicious person, but when he is in the throes of panic and terror and unable to finish a book, everything else pales into insignificance.”

However the work was dragged out, it was extremely popular. The books all became bestsellers, and Adams was given an advance of over $2 million by his American publishers. He wrote a hilarious spoof dictionary with John Lloyd, The Meaning of Liff, in which easily recognised concepts, such as the feeling you get at four in the afternoon when you haven’t got enough done, were given the names of towns—Farnham being the perfect choice for this low-grade depression. In the late eighties he completed two spoof detective novels featuring Dirk Gently.