Marshall Jevons is the pen name of Kenneth G. Elzinga, the Robert C. Taylor Professor of Economics at the University of Virginia. Elzinga, along with William Breit of Trinity University (1933-2011), has written three other Henry Spearman mystery novels under the Jevons pseudonym: "The Fatal Equilibrium" (Ballantine), "Murder at the Margin", and "A Deadly Indifference" (both Princeton).