The Crossword Mystery — Robert B. Gillespie

She starved to death in the midst of plenty. But the 'plenty' was on the other side of a locked door. Someone ha d gone to great pains to confine her in the soundproof room. With no window, with no telephone, with no way to reach the outside world, she could only scream for help. But no one could hear her. There was no h elp. And when she attacked the door w/her one weapon, a letter opener, she succeeded only in making a few gouge marks. Succeeded, too, in starving to death.