Men Are from Mars, Women Are from Venus is about understanding the differences between men and women, so we can communicate better with our partner. John Gray says that in a relationship, men primarily need trust, acceptance and appreciation, while women need caring, understanding, and emotional validation
The 5 Love Languages is about helping you connect better in your relationship or marriage. Gary Chapman says love is not one-size-fits-all. People are very different in what makes them feel loved. The 5 "love languages" are: words, time, gifts, service, and touch.
The Subtle Art of Not Giving a F*** is like your smart but impolite friend explaining some great lessons from philosophy. Mark Manson shows how to live by your values so you can act with less hesitation, do what's most important to you, and stop worrying what people think.
The Four Agreements shows how to love yourself more, not take things personally, and heal your relationships. Don Miguel Ruiz shares wisdom from the indigenous Mexican Toltec culture to help us stop living in this false "dream" of social rules, expectations and judgments.
Nonviolent Communication shows us how to have healthy relationships through openly and honestly communicating our observations, feelings, needs and requests. This book can help us move past dysfunctional communication habits we learned growing up including guilt tripping, being passive aggressive, blaming, labelling and judging others as good or bad.