Reddit mentions of Seeking safety A treatment Manual for PTSD and Substance Abuse (The Guilford Substance Abuse Series)

This is the book used in a support group I'm part of, which is dual-diagnosis for trauma/substance.

Recovery from Trauma, Addiction or Both (if you want to help yourself, the frogcabaret part)

Seeking Safety (therapists book, if you want to learn to help all your parts by also coaching them through these tough topics)

Both cover dissociation in detail, but neither go into dissociative disorders. For that, this book is best in class (IMO):

Coping with Trauma Related Dissociation

Gl,

Dee

I tried going to a 12 step program but the higher power idea didn't feel comfortable to me. Also the way that a lot of different people would talk from different places in the room. I'm Autistic and group conversation can be stressful to me.

The Autism diagnosis was immensely helpful for me in getting sober. I found an Autism-positive psychologist and did a modified form of dialectical behavioral therapy (DBT).

I think DBT is pretty fantastic for anyone who feels a lot of pain or does things that end up hurting themselves. I really like the book Seeking Safety by Dr. Najavits. Here is a link to the book. They also have meetings in a lot of cities so if you google "seeking safety + your location" you may find a group also.