Not necessarily the best starting place for reading about shame. It seems to be written for therapists. However it does go into much more detail of the shame-based compulsive behavioral patterns, and particuarly the family system aspects of it. Its clear this book comes out of a family systems approach to treating addiction, even though they clearly see and explain the perspective is applicable beyond addiction, to many compulsive and self-destructive behaviors.
I picked this book up because John Bradshaw referenced it and spoke to its impact on him. I would definitely recommend reading Bradshaw's works first; they're more accessible, practical, and, I think, see shame in a larger perspective.