In media coverage of the war, Afghans are often characterized as corrupt and deceitful. There has certainly been plenty of corruption and deceit in this conflict, but why? What inspires these behaviors? In 'Green on Blue,' I wanted to render a world that is often overlooked: that of the average Afghans who are helping America wage its war.

Wars have economies. And I don't mean financial economies, although that's often part of it. Why do people continue fighting these wars? There are financial incentives.

There are these moments in the military where you're present at these enormous intersections of history and humanity. I came out of the end of that, and I just wanted to write. If you do it well, you know it will last. It can't get blown away like everything else.

I tried to render the Afghan war as much as I could fro the perspective of the Afghans. I have served as an advisor to Afghan troops, and much of my war experience was seen through the lens of fighting that war alongside Afghan soldiers.

My son, Wolf, was born when I was past 40 and the author of a best-selling novel. That means he has grown up a middle-class child - one who sometimes asks me for stories of my childhood but knows nothing of what it means to grow up poor and afraid. I have worked to make sure of that.

Since 2011, I am happy to say that I have reconciled with Ahmed Hirsi; we have married in our faith tradition and are raising our family together. Like all families, we have had our ups and downs, but we are proud to have come through it together.

When 'Titanic' came out on VHS, I was working at a Sam's Club, which is already the worst. I don't know what you know about working for the Walton family, but it's horrific.

God tells me that I need to provide for my family, discipline and teach my children, and love my wife as Christ loves the church. If I don't do that, I'm being unfaithful and sinful.