Updated: Aug 1
The Divorce Remedy; The Proven 7-Step Program for Saving Your Marriage, by Michelle Weiner-Davis, 2002.
This book is recommended to a person in a couple who is trying to save the marriage. It is supportive of the work that you may be doing in Discernment Counseling.
I love this book because the author is very encouraging and gives advice on how to behave to help retain or regain your partner's interest in working on the marriage.