Original post here.  Sourced on tumblr to megatrip via greatgrottu.  Image is a cover of Terror Tales (February 1935), artist unknown, containing the text “Terror Tales. February. 15¢. Enslaved to Satan, soul-chilling mystery-terror novel by Hugh B. Cave. Riverfront Horror, a novelette of eerie horror by Arthur Leo Zagat. Ray Cummings, George Edson, Robert C. Blackmon.”