American Charles Merrill Smith, a United Methodist minister, who used his own first hand experience of the church bureaucracy, as well as his own personal beliefs, to provide his entertaining crime stories with a really fascinating and convincing church background.
His first non-fiction book, How to Become a Bishop Without Being Religious (published in 1965), had revealed the humorous style (religious but never pious) that he was to develop further in his detection fiction. His irreverent humor won him many admirers among fellow clergy and others, and made the book a best-seller - even if it may not have appealed quite so much to his local bishop!