Written by British journalist and author of mystery and horror fiction J. E. Preston Muddock. In these thrilling stories, Muddock writes under the guise of his fictional alter ego – the private detective Dick Donovan. From the murky underworld of Victorian London to the grand houses of the upper classes, Donovan investigates crime in all its forms, recovering priceless jewels, exposing villainous conspiracies and solving dastardly murders!
49 Tales of The Thinking Machine (49 detective stories featuring Professor Augustus S. F. X. Van Dusen, also known as "The Thinking Machine")
