John Glasby was one such man that I'd not heard of before. I've just read his London Telegraph obituary that was reprinted in the Sydney Morning Herald. John Glasby was a mild mannered chemist by day (although perhaps mention of his research on detonators and rocket propellants suggest otherwise), but in his spare time he churned out hundreds of novels and short stories across many genres. Most of his works were published under pseudonyms so I feel less bad about not having heard of him before.
The obituary is fascinating but is less about the man than the company he wrote for. Indeed it seems that John Glasby and Reverend Lionel Fanthorpe wrote most Badger Books. A fascinating piece of publishing history to read that Badger Books would get the cover art first, and then get the author to write the story for it- often over a weekend! I'm not exactly certain that this is how high art is usually crafted. I don't know that I'd heard of Badger Books particularly before either, but the style of cover is certainly immediately recognisable.
I'm sure we've all seen them, even though Badger Books stopped publishing in 1967. My library has 10 John Glasby books- all in large print format- I guess he's popular with the older readership. I'm going to keep an eye out for one of his books. I'm always astonished at the authors who published hundreds and hundreds of titles. Barbara Cartland was like that too. I read one of her books, simply because she had published 700+ titles. It wasn't as bad as I was expecting but I wouldn't want to read 100 of them, let alone 700.