Disclaimer: I haven't read this book. But I did use the "Search Inside" function to browse through it, and that was how I found and read the section on domestic violence.
According to Crowe, unless a man is using domestic violence in a "sadistic" way, "it is always worth thinking of the violence as an accidental outcome of the struggle between the two partners, and therefore trying to tackle it by helping the couple to live together more peacefully and safely."
He goes on to blame violence on women's verbal skills and "having the last word," which "humiliates" men, and happily describes a case history where cognitive-behavioural therapy allegedly fixed a relationship after the man had sent the woman to the A&E twice with suspected fractures.
Later in the book, he explains that violence should be discussed as "our fights" rather than "your aggression".
This is the sort of discredited advice that leads to people staying with violent partners and trying to "fix" them, blaming themselves for somehow causing the violence. And in some cases, it leads to them ending up dead.