I have found the following resources (books and workshops) tremendously helpful for both clinicians and those in treatment, and would like to share the list with you.
Childhood Emotional Neglect
Running on Empty by Jonice Webb, PhD.
WORKING WITH TRAUMA
The Four Agreements by Don Miguel Ruiz.
The Divine Journey by Janet Myatt.
Facets of Unity - The Enneagram of Holy Ideas by A. H. Almass.
Hold Me Tight Couples Workshop based on Emotionally Focused Therapy (EFT) and the work of Dr. Sue Johnson.