I'm currently reading the book, The Drug of the New Millennium:The Brain Science Behind Internet Pornography Use.
http://www.amazon.com/Drug-New-Millenni ... 854&sr=1-1
I am finding it quite helpful. I think it would be especially helpful to the wife of a sex addict or any man who struggles with purity.
One section that stands out is on the differences between the female and male brain as it relates to sexual stimulation. I think it will help women to better understand a man's temptations. Hopefully she will be able to forgive and also take the sins quite seriously.
It is not a religion book, nor is it written in technical language for medical professionals. The author, M. Kastleman, often mentions God's plan for sexuality in marriage but does not quote scriptures.
Kastleman also has articles and podcasts on this subject, however I like the book's presentation much more, especially for wives of sex addicts.
http://www.internetsafetypodcast.com/?p=25
http://www.netnanny.com/learn_center/article/169
