Address Unknown

In this new Mercury Carter thriller, the self-styled freelance mailman crisscrosses the Southwest as he juggles his latest delivery with his search for his father’s killer and for a missing fitness fanatic.

Mercury Carter’s current assignment seems innocuous enough: deliver a JurassiCat—a wildly popular and sought-after toy—to a three-year-old girl in Los Angeles, courtesy of her doting grandparents. The trip out west also gives Carter the chance to detour through Phoenix, Arizona, where the...