Thanks Minnie,and others, I'd forgotten about Nero Wolf & Raymond Chandler. Somehow, I'd completely missed Laurie R. King, that looks appealing to me. GS10 has hit a stage where he likes the main characters to be male, or at least one of the main character to be male. He may try King's 'Mary Russell' if I read them, he loves discussing books!

I may try a few Agatha Christie's, too.