I purchased this book as I was interested in finding out more about "co-dependance" and understand that the particular treatment centre in which the author is based is on the cutting edge of such treatments. I had read varied and fragmented interpretations & critiques so far of this ambiguous "co-dependence", nothing comprehensive.
Unfortunately this book seems to have confused me further..... co-dependance is apparently originally about the families of alcoholics and how they become or are dependant on the alcoholic remaining so, so the families have their own sickness: co-dependance. This has now broadened to include people in other situations (unclear which) but the basis of this book's interpretation is that there are five core symptoms, but they are too general and overlap with many other situations and issues to be truly definitive. Then there are five types of "abuse" which are said to be at the roots of co-dependance. Quite frankly this term "abuse" is overly-used and is traditional practise in other cultures, such as spiritual beliefs and touching, such as kissing on greeting, etc. Personal boundaries also differ widely from culture to culture. The definitions in the book are therefore very narrow and culture-specific.
So I would say this book is for people who feel specifically "abused" and "dysfunctional" by the above factors, but I cannot see how those factors are themselves definitive of a "disease" as they are too broad and lack contextual and cultural awareness.