Susan Cummins Miller, a former field geologist with the U.S. Geological Survey and college instructor, is a research affiliate and SIROW Scholar with the University of Arizona’s Southwest Institute for Research on Women, USA. In addition to the Frankie MacFarlane mysteries, she is the editor of A Sweet, Separate Intimacy: Women Writers of the American Frontier, 1800–1922 (TTUP, 2007). She lives in Tucson, USA.