The Glass Key is a novel by American writer Dashiell Hammett. It was first published as a serial in Black Mask magazine in 1930, then was collected in 1931 (in London; the American edition followed 3 months later). It tells the story of a gambler and racketeer, Ned Beaumont, whose devotion to Paul Madvig, a crooked political boss, leads him to investigate the murder of a local senator's son as a potential gang war brews. Hammett dedicated the novel to his onetime lover Nell Martin.