I read this book years ago. I gave it to my H. Although I am working on me with 12 steps, I like the simplicity of not building addiction into a disease, I like the AVRT, I laugh over what he calls the addict.
I'm pretty sure when I kicked my H out, it was more Rational Recovery than Al Anon.... There is a lot of good info indeed on their website.
https://rational.org/index.php?id=1