Yes, I've read The Making Of A Detective Novelist and enjoyed it greatly. Not only is Sayers a great letter-writer, the book is edited so intelligently (UNLIKE the letters of another great writer, Robertson Davies. Bleah.)

I agree that Reynolds' is the best biography. Brabazon is my next favorite. Such A Strange Lady is trash and I have insisted that my father not keep it on the shelf beside his copies of Strong Poison and the rest.