NASW IA Member Greg L. Nooney, LISW has a new book coming out from NASW Press Diagnosing and Treating Dissociative Identity Disorder: A Guide for Social Workers and All Front-Line Staff. 

According to Nooney:

Although there are excellent resources available describing successful treatment modalities for clients with DID, these resources are often inaccessible to social workers and other front line mental health workers who are overworked, underpaid, under-trained, under-supervised, and are subject to vicarious traumatization. My slim 200-page book, besides offering a comprehensive treatment method for working with clients with DID, offers a coherent summary of what we currently know about the effects of trauma, attachment wounds, and memory. This will be helpful to anyone being trained to work directly with clients in need, including social work students and others studying to be therapists, chemical dependency counselors, school counselors and those pursuing other forms of counseling. In addition, I believe that friends and family members of clients with DID will find the book enlightening.

You can purchase the book from the NASW Press:

https://naswpress.org/product/53666/available-for-preorder-diagnosing-and-treating-dissociative-identity-disorder