The Knight of Darkness battles murderous supervillains in two thrilling pulp novels by Walter B. Gibson. First, The Shadow wages a final battle against his greatest enemy, Shiwan Khan, in "Masters of Death." Then, savage drums promise eerie menace when Professor MacAbre attempts to bring "Voodoo Death" to The Shadow and Margo Lane! Plus, a murderous Shadow uses the power of invisibility for evil and sets a deadly trap for Lamont Cranston in "The Shadow Challenged." Which Shadow will have the last laugh?