Diogenes Club series "Sherlock". The Diogenes Club has appeared, in various forms, in a great many other settings, most of which take as given the Club's connection to the British Secret Service: Diogenes Club The Diogenes Club is a fictional gentleman's club created by Sir Arthur Conan Doyle and featured in several Sherlock Holmes stories, such as "The Greek Interpreter". It seems to have been named after Diogenes the Cynic (although this is never explained in the original stories) and was co-founded by Sherlock's indolent elder brother, Mycroft Holmes. The club is described by Sherlock Holmes in the story "The Adventure of
Minor Sherlock Holmes characters Sherlock Holmes and Irene Adler. He appears in two pastiche novels by author John Lescroart, "Son of Holmes" (1986) and "Rasputin's Revenge" (1987). Lupa, a secret agent during the First World War, is strongly implied to be the younger version of fictional detective Nero Wolfe in the mystery series by Rex Stout. Enola Holmes is the younger sister and youngest sibling of Sherlock and Mycroft Holmes. She appears in the series "The Enola Holmes Mysteries" by Nancy Springer and it could be inferred that she appears in the story "The Copper Beeches" as Violet Hunter, however there is not enough