Definitely recommend:

Mating in Captivity: Unlocking Erotic Intelligence by Esther Perel; Can we desire what we already have in romantic relationships?

The State of Affairs: Rethinking Infidelity by Esther Perel; More on modern love and expectations in our romantic life.

The Ethical Slut, Third Edition: A Practical Guide to Polyamory, Open Relationships, and Other Freedoms in Sex and Love by Janet W. Hardy and Dossie Easton; The ins and outs of ethical consensual non-monogamy.

Tiny Beautiful Things: Advice on Love and Life from Dear Sugar by Cheryl Strayed; An alternative to Dear Abby, profound and deeply touching.

Women, Food, and God by Geneen Roth; Mindfulness to heal disordered eating.

Awakening the Buddha Within by Llama Surya Das; Intro to Buddhism for a lay person.

How to Change Your Mind by Michael Pollan; Current and historical research on psychedelics as medicine in psychology, transformative experiences in well people.

The Body Keeps the Score by Bessel Van Der Kolk; How trauma affects humans.

The Guide to Getting it On by Paul Joannides; Overview of everything sex.

The Seven Principals for Making Marriages Work by John Gottman; Basics skills and pitfalls in relationships.

Meditation for Fidgety Skeptics by Dan Harris; Self explanatory title. Humorous and light, an easy read.

Currently reading and loving:

Women Who Run With the Wolves by Clarissa Pinkola Estes; Deep exploration of emotional lives of women.