Bill Pronzini: The Hangings (USA 1990)
From the Publisher:
The sleepy town of Tule Bend came alive with terror after a drifter was found hanging. The constable knew his job was on the line if he didn't do something. When more swinging bodies appeared he knew he had to move fast because he was next on the hangman's list.
Bill Pronzini: The Hangings. Ballantine Books, ISBN: 0345363957 (January, 1990), 155 p., $2.95.