« Death-Watch » John Dickson Carr

A clockmaker is puzzled by the theft of the hands of a monumental new timepiece he is preparing for a member of the nobility. That night, one of the stolen hands is found buried between a policeman’s shoulder blades, stopping his clock for all time. The crime is just peculiar enough to catch the attention of Dr. Gideon Fell, the portly detective whose formidable intellect is the terror of every criminal in London. Working closely with Scotland Yard, he finds that the case turns on the question of why the clock hands were stolen. And learning the answer will put Dr. Fell squarely in the path of a madman with nothing but time on his hands.