Marshall Jevons is the pen name of Kenneth G. Elzinga, the Robert C. Taylor Professor of Economics at the University of Virginia, and William Breit of Trinity University (1933 2011). Together they wrote two other Henry Spearman mystery novels under the Jevons pseudonym: "The Fatal Equilibrium" (Ballantine) and "A Deadly Indifference" (Princeton). Elzinga, as Marshall Jevons, most recently wrote "The Mystery of the Invisible Hand" (Princeton).