12 Hours to a Great Marriage: A Step-by-Step Guide for Making Love Last

Howard J. Markman, PhD, is the lead author on our best-selling Fighting For Your Marriage. Dr. Markman is professor of Psychology and co-director of the Center for Marital and Family Studies at the University of Denver, co-author for many of our other PREP books and one of the best known, most respected experts in the world on marriage enhancement and divorce prevention.

Scott M. Stanley is lead author of our best-selling Christian marriage book A Lasting Promise, co-author of Fighting For Your Marriage, and co-director of the Center for Marital and Family Studies at the University of Denver.

Susan L. Blumberg is a co-author of Fighting For Your Marriage and director of Interpersonal Communications Options.

Natalie H. Jenkins is the lead author of You Paid How Much For That and vice-president/marketing director of PREP; All four authors live in Denver, Colorado.

Carol Whitley is the author of The Everything Creative Writing Book and lives in Los Altos, California.