Markie L C Twist Author & Editor

Katherine M. Hertlein, PhD, LMFT, is a Professor in the Couple and Family Therapy Program in the School of Medicine's Department of Psychiatry and Behavioral Health at the University of Nevada, Las Vegas, and has published eight books on couple and family therapy.

Markie L. C. Twist, PhD, LMFT, LHMC, CSE, is the Program Coordinator of the Graduate Certificate in Sex Therapy and Professor of Human Development and Family Studies at the University of Wisconsin-Stout, Wisconsin.