By Dr Oliver Tearle (Loughborough University)
Even among diehard Sherlockians, the nine-book ‘canon’ of Conan Doyle-authored Sherlock Holmes books has surprisingly few out-and-out classics that all can agree on. The first two novels, A Study in Scarlet and The Sign of Four, show Doyle still finding his feet with the two central characters, and the mysteries themselves are in some respects short stories stretched out to novel (or perhaps only novella) length.