Mending a Shattered Heart: A Guide for Partners of Sex Addicts, 2011, by Stephanie Carnes.

Prodependence: Moving Beyond Codependency, 2018, by Robert Weiss, CSAT-S.

Sex Addiction: The Partner's Perspective: A Comprehensive Guide to Understanding and Surviving Sex Addiction For Partners and Those Who Want to Help Them, 2015, by Paula Hall
 
Intimate Treason: Healing the Trauma for Partners Confronting Sex Addiction, 2012, by Claudia Black, Ph.D. and Cara Tripodi, LCSW.
 
Deceived: Facing Sexual Betrayal, Lies and Secrets, 2009 by Claudia Black, Ph.D.
 
Your Sexually Addicted Spouse: How Partners Can Cope and Heal, 2009, by Barbara Steffens.