The French Powder Mystery by Queen, Ellery - 1979

New York: Signet, 1979. Reprint. Mass Market Paperback. Good. Special 50th anniversary edition. Spine faded, faint edge wear. 1979 Mass Market Paperback. French's department store was famous for the rare merchandise it offered its elite clientele. But no one there could be proud of its latest exclusive window display: the bloodstained corpse of the owner's wife.  Ellery Queen and his father, Inspector Richard Queen, soon discover that this palace of commerce is a viper's nest of fear, jealousy, suspicion, and hatred, where love is cheap and the price of honor marked down. But worst of all is the mysterious mocking mastermind who is out to turn the glittering store into a bargain basement of murder.