The Knight of Darkness investigates daring jewel robberies in two pulp thrillers by Walter B. Gibson. First, an attempted diamond theft by a Shadowy impersonator leads the Dark Avenger through a winding trail of murder to uncover stolen "Gems of Doom." Then, reflections of evil guide The Shadow through a web of international intrigue to retrieve a rajah's fabulous jewels, the priceless "Tear-drops of Buddha." Plus, a rare Golden Age adventure of Iron Munro by science fiction great Theodore Sturgeon from Shadow Comics #5!