Gunn, Elizabeth. Par four. New York: Walker and Company, 2004. ISBN 0-9027-3324-7.

Summary: The police force of a medium-sized Minnesota town exposes a collection of seemingly unrelated crimes -- a sale of cocaine, a robbery at a bar, two murders -- as a single complicated story of violence and greed. The emphasis is on the police procedures, and the main impediments that the police struggle against are the rapid changes in their understanding of the motives of the participants in the crimes and the difficulty of keeping each of the people investigating different pieces of the puzzle informed about the others' discoveries.