The Adventure of the Greek Interpreter Sherlock Holmes, far from being a one-off in terms of his powers of observation and deductive reasoning, in fact has an elder brother whose skills, or so Holmes claims, outstrip even his own. As a consequence of this, Watson becomes acquainted with the Diogenes Club and his friend's brother, Mycroft. Mycroft, as Watson learns, does not have the energy of his younger brother and as a consequence is incapable of using his great skills for detective work: In spite of his inertia, the elder Holmes has often delivered the correct answer to a problem that Sherlock has brought to him.
Detective fiction whose V. I. Warshawski books have explored the various subcultures of Chicago. Martin Hewitt, created by British author Arthur Morrison in 1894, is one of the first examples of the modern style of fictional private detective. This character is described as an "'Everyman' detective meant to challenge the detective-as-superman that Holmes represented." By the late 1920s, Al Capone and the Mob were inspiring not only fear, but piquing mainstream curiosity about the American crime underworld. Popular pulp fiction magazines like "Black Mask" capitalized on this, as authors such as Carrol John Daly published violent stories that focused on the mayhem