The Knight of Darkness continues his war on crime in two more pulp thrillers by Walter B. Gibson (writing as "Maxwell Grant"). First, not even The Shadow's bullets can stop his most formidable foe, "The Gray Ghost," a seemingly supernatural adversary. Then, Lamont Cranston and Margo Lane hunt Nazi treasure and a blonde temptress as they attempt to unmask "The White Skulls," skeletal-garbed terrorists who leave behind a deadly wake of destruction...