Oh, wow! I take it back about reading the book by this author. 11 reviews on Amazon only...

The book recommended by indygerry has over a thousand reviews, most of them positive. I would go with that one.

Codependent No More: How to Stop Controlling Others and Start Caring for Yourself Paperback – September 1, 1986
by Melody Beattie (Author)
1,043 customer reviews