I haven't read either of the books, but I looked them both up on Amazon.com and read the editorial reviews and all the customer comments. Looks like a lot of wishful thinking to me. I've read a lot about interventions written by specialists who have conducted hundreds of them, and unless the alcoholic is already prepared to focus on his/her recovery, they don't work. If the alcoholic still has more drinking to do, it will be done no matter what.
I sense that you're looking for confirmation that there's still hope for your marriage. I may be wrong, but I caution you to be realistic.