Helpful Score: 1
For Couples Only is a two book set that includes For Women Only as well as For Men Only. These are great to grow closer together as a couple with a deeper understanding.
Even a few marital counselors I know would not recommend these books. It's not gentle toward its readers, it's blunt and sometimes harsh with their perspective of reality. Read Love and Respect or Love Busters if you're looking for books to help you better understand your marriage.