Dorothy Sayers (1893-1957) wrote best-selling detective stories (Lord Peter Wimsey, Harriet Vane, The Nine Taylors) but was just as well-known at the time for her writings and plays on religion (The Man Born to be King, for example). As I wrote in my book Debating Faith (2021):

“She was a doughty warrior who sallied forth against the heathen and the indifferent, and especially against Christianity’s supposed followers. She accused them of surrendering to the unbelieving temper and pressures of the age. Don’t be ashamed, she chided them. Speak out loudly and widely about the wonders of the Christian faith”.