Voorbij Mars en Venus: Handvatten voor relaties in moderne, complexe tijden: Handvatten voor relaties in moderne, complexe tijdenJohn Gray4
Mars and Venus Starting Over: A Practical Guide for Finding Love Again After a Painful Breakup, Divorce, or the Loss of a Loved OneJohn Gray4.1
What Your Mother Couldn't Tell You and Your Father Didn't Know: Advanced Relationship Skills for Better Communication and Lasting IntimacyJohn Gray4.2
A Summary of Men Are from Mars, Women Are from Venus: The Classic Guide to Understanding the Opposite SexJohn Gray4.1