I stumbled across this recently - back in the 70s publishing houses were paying people to churn out book.

https://www.youtube.com/watch?v=3nlbfZGFKuI

Donald Rowland, a Suffolk author of nearly 200 books - written under more than 30 pseudonyms - has made a living out of his romantic fiction. Donald churns out more novels than anybody else in the county. He specialises in old-fashioned romance, his heroes and heroines are morally beyond reproach, there is no sex in his novels. The reason for his prolific output is simple - Donald is paid just fifty pounds per book.