"Going All the Way: The Heart and Soul of the Exceptional Marriage"
"Exceptional Relationships: Transformation Through Embodied Couple's Work"
both by Brian and Marcia Gleason LCSW's
"Power Tools for Couples Workbook" by LIz Carl LCSW and Barry Carl, CCEP
"The Seven Principles for Making Marriage Work" by John M. Gottman, PhD and Nan Silver