"Partners in Crime"- Agatha Christie.
Well GG, my first experience of Agatha Christie was with the Belgian, Poirot. It was the French translation of:"Murder on the express orient". I fell for him and I thought he was the ONE, but then granma Marples came along in "The body in the Library", and for a long time, I couldn't make my mind as to who to go out with. About 4 months ago, I came across a couple. They were just Friends then: Tommy and Tuppence. They made their apparition for the first time in "The secret adversary", and Tuppence-the girl of the couple- hit me by the sharpeness of her brains, and what was meant to happen, happened: I fell in love with them. Tommy, though a little slow of the understanding was also great. I couldn't resist the temptation, and I went for the second novel that portrayed them : "Partners in Crime". So I believe, her regulars were: Hercule Poirot, Joan Marple and Tommy and Tuppence Beresford. In addition of those,she used other fictional characters like the one in "Crooked house", but I forgot his name. If I am to choose one, I think I'll go for the couple, Tommy and 2pence.I heard of the non-fiction story you did mention but I've never came across it.