I found the book "Not Under Bondage" immensely helpful. When my wife's friend began to reveal to us the treatment she was receiving from her husband (a serving pastor at the time), it was clear that it was abuse. The first chapter of this book "What is Abuse" was extremely helpful in confirming this, by revealing that abuse isn't just physical but emotional, spiritual, sexual and social, and giving helpful examples of each.
But questions were arising? Could our friend separate herself from her abusive husband? Would she have scriptural grounds for divorce? These and other questions were answered in a very clear and biblical way by Barbara Roberts. Issues such as constructive desertion, church discipline, scriptural grounds for divorce and remarriage are dealt with thoroughly throughout the book.
I heartily recommend "Not Under Bondage" to any Christians (pastoral carers, clergy, victim/survivors) who are currently facing these issues, as well as to those who may well do so in the future. It is a book carefully written and giving a truly biblical perspective on these matters.