E. W. Hornung 
Crime Doctor 

In the tradition of the Great Detective, Sherlock Holmes, we present E.W. Hornung’s THE CRIME DOCTOR. John Dollar, a former soldier recovering from a head injury, becomes an amateur sleuth as well as a man of medical science- one with a unique outlook on the criminal mind, and how to treat this growing threat to Crown and Country; and as the villains will discover, he stands ready to use the black arts of subterfuge, disguise, and violence in the service of a good cause. In his exploits throughout Europe, he encounters mystery and deception beginning with a theft from Britain’s secretary of state; a race to save a wrongly condemned man; the questionable rehabilitation of a career criminal; a spy with access to the Admiralty’s most secret blueprints; an intrigue-ridden Continental train trip; a Swiss trek to aid the surgeon who healed him of his kleptomania, a haunting at an English manor; an encounter with arson-minded suffragettes; and finally, a showdown with a murderous arch-foe. (Goodreads)