I think the information you are posting from the book is very validating. It describes my family and son to a tee and gives me room to feel ok about myself. Somehow, it takes the blame off me and places it squarely back where it should be.
However, Loloma is right; we are still left with the trauma. I don't know if this helps, but my therapist recommended a book called The Four Agreements. The one he wanted me to think about has to do with this: the more someone is in your face about how flawed you are how dysfunctional or whatever, the more that person is struggling with themselves. So we practice not taking it personally, but try to deflect it. I don't have the book yet, but it sounds like another way of arriving at the same conclusion: that we are not the ones that deserve the flack; we are the ones that have to change our responses to the perpetrator; they won't change. That may mean removing self from situation or lives of others.
Having PTSD makes it that much more challenging because it is a chemical and emotional response. In my case, I think it will take multiple strategies for me to recover. Connecting my brain with my body and heart is a big challenge. I feel I am just beginning to walk this road.