These are suggested workbooks for partner recovery from intimate betrayal trauma, as a result of your partner's sex addiction. They provide education, and exercises. You can work them on your own, but working them within a group setting can be even more healing and beneficial.
(Affiliate links in these recommendations)
Facing Heartbreak: Steps to Recovery for Partners of Sex Addicts by Stefanie Carnes, et al
Unleashing Your Power: Moving Through the Trauma of Partner Betrayal by Carol Juergensen Sheets
From Betrayal Trauma to Healing & Joy: A Workbook for Partners of Sex Addicts by Marsha Means, MA
Moving Beyond Betrayal: The 5-Step Boundary Solution for Partners of Sex Addicts by Vicki Tidwell Palmer
Betrayal & Beyond Workbook by Diane Roberts – Faith Based
Rescued by Shelley Martinkus – faith based, not betrayal trauma informed