Daring Mystery Comics #4 (1940)

A collection of comics and stories, including -- "Busting a Banker" , featuring the Purple Mask :   A daring bank robbery leads the Purple Mask after the gang responsible and he discovers that the bank's President is involved with the crime. -- "The Zeppelin Attack" , featuring K-4 and His Sky Devils --  K-4 and his assistants are assigned the job of tracking down an enemy zeppelin that is being used to drop mines by parachute over vital installations. -- "On the Trail of Muro" , featuring Monako --  Monako must go up against his old enemy, Muro, who is attempting to gain control of the Pacific and west coastal areas of the Americas, specifically the Panama Canal. -- Plus:  Whirlwind Carter, Marvex the Super Robot, Breeze Barton, and more!!