Keeban

Edwin Balmer's 1923 novel Keeban is a mystery-adventure-romance, billed as “a novel of the Underworld and the Upper”—meaning, of course, that it has High Society clashing with the criminal classes. It's a good read and has been unjustly neglected. Science fiction readers (who only know him as the co-author of two classic SF novels, When Worlds Collide and After Worlds Collide) are not likely to track it down. Mystery readers favor his 12-story series about Luther Trant, an early scientific detective using the new science of psychoanalysis to help track down crooks. (The Luther Trant series was co-written with William B. MacHarg, Balmer's brother-in-law, also a prolific pulp author.)