Satan's Vengeance — Carroll John Daly

The influence of an Underworld lord known as The Other Man has crept into the Police Commissioner's office. This criminal mastermind is forcing the market owners of New York to pay protection to him, and is getting control of all rackets. In desperation, the Police Commissioner appeals to Satan Hall, the cop who believes in killing criminals as they kill others, the one man on the police force that all the Underworld fears. First time in book form. By the creator of the hard-boiled detective story, Carroll John Daly.