The Master of Darkness investigates baffling mysteries in two classic pulp novels by Walter B. Gibson. First, The Shadow must unravel the baffling mystery of "The Ribbon Clues" to stop a serial killer and unearth hidden millions! Then, to unmask a diabolical super-crook, The Shadow follows a bizarre trail of murder that leads from San Francisco to Chicago and Manhattan as "Death Rides the Skyway" in an thrill-packed tale of industrial sabotage and deadly greed.