That is, the books that made him love reading and how he incorporated those early works into his own style. This is from a very late interview with Tom Chivers published after his death in 2015:

“I wasn’t particularly interested in books,” he says. “And my mum, God bless her, she rolled up her sleeves and gave me a penny per page, and it worked beautifully. I think she only gave me about thruppence, because the third book was The Wind in the Willows.” He was so enthused after this, she no longer needed to pay him. Indeed, Pratchett got a job in Beaconsfield library. “You’re talking to a man who thinks, mostly, that his school days assisted him not at all, but the library did, in spades.” He looks at me sharply. “You, when you were young, read lots of books, didn’t you? A –” he pauses, and chooses his next word carefully – “a —-load, I believe?” I did, I reassure him. “A library boy. I recognise the kind. I was the same.” He had an indifferent time at school – he grumbles about the “death or glory” nature of the 11-plus (he passed easily), and about old teachers who had a grudge against him at the High Wycombe Technical High School (“sort of half a grammar school. A big woodwork place”). But the fire kindled by Kenneth Grahame, and Ratty, Mole and Badger, grew, and blazed.

The cover of Discworld Imaginarium by Terry Pratchett’s “artist of choice”, Paul Kidby.

Pratchett’s own sense of humour, a sort of gentle, English, observational thing, stems from this period. “Wodehouse, obviously, but also I tore my way through the Just William books. Richmal Crompton was a very good writer. I think it was from her that I learnt irony. It took me a while to work it out.” Do you think you could define irony, I ask him. “Sort of like iron.” I deserved that, I acknowledge. “When you get hit on the head with it, you know it.”

He also fell in love with RJ Yeatman and WC Sellar, authors of 1066 and All That (“in the Thirties, when the middle classes were getting richer, the two of them really got as much fun out of that as you could. The Thirties were an awful lot of fun. Or at least until the end. Bad ending, the decade, admittedly”) and fell out with his headmaster for “bringing in a copy of Mad magazine. How horrible! And a copy of Private Eye. Seditious.” But it was the now defunct satirical magazine Punch which really formed the comic voice in which he now speaks. “I read my way through all the bound Punches. It was the best way to read history; you got it without granny looking over your shoulder, and it was just astonishing.

“And just about any writer of distinction, anywhere in the English language, worked for Punch. Mark Twain. Jerome K Jerome. And they spoke with the same voice, which opened the door for me – the same kind of slightly satirical, people-are-rather-silly-but-they’re-not-that-bad voice, friendly about humanity, fond of its foibles.” Apart from the books, the other influences of his youth are clear in his own writing – especially the later Ankh-set works, in which he frequently extols the virtues of the poor-but-respectable people living in tiny, tidy terraced houses, and of the self-made men and women. “There used to be a sort of dignity in labour,” he says. “I don’t think there is now.”

He has spoken, often, of how his time on local newspapers made him. He started at 16, in high dudgeon at his headmaster: “On my last day at the school, I left all my stuff behind and phoned up the editor of a local newspaper. He actually used some cliché like, ‘I like the cut of your jib, young man’, or something.” It is the stuff of legend that he saw his first dead body the next day, “work experience really meaning something in those days”, as he put it in his author’s bio in his books.

“Truthfully, without over-egging it, as I often do,” he says, “the library and journalism, those things made me who I am. Journalism makes you think fast. You have to speak to people in all walks of life. Especially local journalism. London journalism can p— in someone’s face and they can’t do anything about it. Try that in local journalism, and someone’s down to complain. Everyone should have one local journalism job in their lives, especially if they’re a nosy parker.” He talks of local journalists in the same way he does his parents, with a sense of quiet heroism. “I interviewed an elderly journalist who’d worked in a small town for a very, very long time. I asked: is it boring? And he said: over there, that’s where a couple pushed their daughter into the attic because she’d had a black baby. And over there, that’s where a man was caught in flagrante delicto with a barnyard fowl. And he’d said to the magistrates, ‘Well, it was my fowl’. Even those small moments, they make you realise the world is not as you thought.”