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It's a slow day at Scotland Yard, so Inspector Henry Tibbett takes a busman's holiday, immersing himself in the world of puzzling puzzlers. The hijinks kick off with an amusing gift: Someone unnamed has sent Henry the beginnings of a crossword puzzle. Even more mysterious: The... Read Full Overview

When Henry Tibbett receives an anonymous crossword puzzle in the mail, he assumes it is just a prank. But when, bored with a slow summer, he begins to fill in the empty squares, he realizes he may have something deadly on his hands.

When Henry Tibbett receives an anonymous crossword puzzle in the mail, he assumes it is just a prank. But when, bored with a slow summer, he begins to fill in the empty squares, he realizes he may have something deadly on his hands.