I often recommend the books below to deepen understanding of the problem you are dealing with. Below is a list of the books that I am currently recommending, and perhaps you will find them useful too.
personal growth
Living Like You Mean It,Ronald Fredrick, Ph.D
The Gifts of Imperfection,Brene Brown, Ph.D
Mindsight,Daniel Siegel, MD
Self-Compassion: The Proven Power of Being Kind to Yourself,Kristin Neff, Ph.D
It's Not Always Depression,
Hilary Jacobs Hendel, LCSW
Marital/Couple Issues
Hold Me Tight: Seven Conversations for a Lifetime of Love
by Susan Johnson, Ph.D
Love Sense: The Revolutionary New Science of Romantic Relationships
by Susan Johnson, Ph.D
An Emotionally Focused Workbook for Couples: The Two of Us
by Veronica Kallos-Lilly and Jennifer Fitzgerald
Emotional Safety: Viewing Couples Through the Lens of Affect
by Don R. Catherall
The Seven Principles for Making Marriage Work: A Practical Guide from the Country's Foremost Relationship Expert
by John Gottman, Ph.D
10 Lessons to Transform Your Marriage by
John Gottman, Ph.D
What Makes Love Last: How to Build Trust and Avoid Betrayal
by John Gottman, Ph.D
Reconcilable Differences: Rebuild Your Relationship by Rediscovering the Partner You Love—without Losing Yourself
by Andrew Christensen, Ph.D, Brian D. Doss, Ph.D, and Neil S Jacobson, Ph.D
Attached: The New Science of Adult Attachment and How it Can Help You Find—and Keep—Love
by Amir Levine and Rachel Heller
Insecure in Love, Leslie Becker-Phelps, Ph.D
Why Won’t You Apologize?, Harriet Lerner, Ph.D
Stop the Fight!, Michelle Brody
How Not to Hate Your Husband After Kids, Jancee Dunn
Loving Like you Mean It,
Rod Frederick, PhD
Sexual Issues
Don’t Call It Love: Recovery from Sexual Addiction
by Patrick Carnes, Ph.D
Out of the Shadow: Understanding Sexual Addiction
by Patrick Carnes, Ph.D
Facing the Shadow: Starting Sexual and Relationship Recovery
by Patrick Carnes, Ph.D
The Porn Trap: The Essential Guide to Overcoming Problems Caused by Pornography
by Wendy Maltz, L.C.S.W. and Larry Maltz, L.C.S.W.
Lust, Anger, Love: Understanding Sexual Addiction and the Road to Healthy Intimacy
by Maureen Canning, LMFT
Breaking the Cycle: Free Yourself from Sex Addiction, Porn Obsession, and Shame
by George N. Collins, MA and Andrew Adleman, MA
Thirty Days to Hope and Freedom from Sexual Addiction: The Essential Guide to Beginning Recovery and Preventing Relapse
by Milton S. Magness, D.Min.
Recovery Zone, Volume 1: Making Changes That Last: The Internal Tasks
by Patrick Carnes, Ph.D
Love Addict: Sex, Romance, and Other Dangerous Drugs
by Ethlie Ann Vare
Coping with Erectile Dysfunction, Barry McCarthy, Ph.D
From the Living Room to the Bedroom, Drs. Bill and Ginger Bercaw
Come As You Are, Emily Nagoski, Ph.D
Enhancing Couple Sexuality,
Barry McCarthy, PhD and Emily McCarthy
The Sexual Healing Journey,
Wendy Maltz
Infidelity, Betrayals, and Forgiveness
After the Affair- Janis Abrams Spring
Forgiving the Unforgivable- Beverly Flanigan, M.S.S.W.
How Can I Forgive You?- Janis Abrams Spring
Not "Just Friends" Rebuilding Trust and Restoring Your Sanity After Infidelity-Shirley Glass, Ph.D.
Getting Past the Affair: A Program to Help You Cope, Heal, and Move On- Together or Apart-Douglas K. Snyder, Ph.D., Donald Baucom, Ph.D. Kristina Coop Gordon, Ph.D.
I Love You But I Don't Trust You: The Complete Guide to Restoring Trust in Your Relationship-Mira Kirshenbaum
Intimacy After Infidelity: How to Rebuild and Affair-Proof Your Marriage-Steven Solomon, Ph.D. and Lorie Teagno, Ph.D.
When Good People Have Affairs: Inside the Hearts and Minds of People in Two Relationships- Mira Kirshenbaum