This book has a lot of value to offer, but it's not about sex addiction. There's a difference between desensitization and sex addiction, and this book addresses desensitization. True addiction involves a cycle that includes elements of compulsion, detachment, acting out, and shame. That is not remotely what Crosse describes. Instead, he writes about desensitization: how the use of pornography can desensitize a person to sex in such a way that all of the emphasis is placed on lust/the physical while the emotional experience is increasingly overshadowed, and how that use desensitizes a person to the objectification of women as well. When a person uses pornography on a regular basis, they can become focused on the selfish nature of the gratification and lose sight of sex as a way to bond emotionally. The objectification in porn can bleed over to other areas of life until the person looks around and just sees potential objects for their own enjoyment. Sex stops being a give-and-take act of love and becomes all about physical pleasure and self-gratification, which then leads to considering sexual acts involving less and less emotional connection.
This is one of the dangerous consequences of porn, particularly in a Christian marriage, and it's good to have a book addressing these dangers, particularly in a society that says, "it's just porn," and doesn't see the dangers of that desensitization. If you're looking for a book that addresses these aspects of porn use, particularly if you're in a Christian marriage, you'll find this book useful.
However, this is not the same thing as sex addiction. Crosse doesn't describe any feelings of compulsion. He wasn't acting out to escape the painful feelings of life. He wasn't consumed with shame each time he acted out. He used porn because he didn't think it was a big deal and it "felt good," and experienced a desensitization. He did feel shame once he "confessed his sin" and "repented," and he does struggle with temptation, but that's NOT the same thing as addiction. In true addiction, he would've tried to stop when he realized it was wrong and found himself completely unable to do so. He would've fought urges he couldn't control. He would've experienced the detachment of using. He would've needed to completely restructure his coping mechanisms and beliefs, work through a process such as a 12-step program, figure out and work through what was driving him to use, etc. Porn wasn't his coping mechanism: it was just a self-indulgence that took him down a bad and selfish path.
With true addiction, repenting and handing your life over to God is not enough to correct the problem. That's certainly helpful, but the above steps are still necessary. I think any sex addict who reads this book is going to feel angry with the author for calling himself an addict and frustrated by the lack of material to which they can relate.
If you are suffering from ACTUAL sex addiction, particularly if you're in a 12-step program and identify strongly with the feelings and experiences expressed by other members in your group, I don't think you'll find much value in this book. However, if you've tried a 12-step meeting or two and didn't identify with the experiences of those there, you may well be suffering from desensitization rather than an addiction, and it might be worth reading this book to see if it resonates more with your experience. Desensitization is still damaging to individuals and relationships; it's just handled in a different way than addiction.
I think desensitization is a pervasive issue in this age of porn that is so readily available and easy to hide, but it's just not the same as addiction, and referring to it as addiction is part of why it suddenly seems like everyone has a "sex addiction," and why so many are skeptical of the existence of sex addiction. I hope that as more research is done, a better distinction will be made between these two issues so that both can be better understood. It's a shame that this book is classified as being about sex addiction, because that undermines its value in combating desensitization, and it also confuses the issue of true addiction.