The reigning Queen is without a doubt Agatha Christie. She wrote 67 detective novels and 14 short story collections, featuring the famous Belgian detective Hercule Poirot, spinster sleuth Miss Marple and others. Christie stretched and polished some of the known conventions of detective novels, and creating some of her own that have become classic tropes of the genre. (Gathering round all the suspects at the end for the denouement). Her clever plots twisted and turned, but almost all had a satisfactory end, and turned some of the conventions of the Golden Age on it’s head – especially The Murder of Roger Ackroyd.