I was examining what religious identity meant in Africa. Along the edge of the Islamic world, what patterns were shaping identity? And the truth is, when I looked at the rise of violent forms of religion, no single identity was prevalent. It's central to note that in Nigeria, that tree is rooted primarily in Christianity. It's not just Islamic militants in the Middle Belt.

One of the things about landays is that they thrive in a modern context. Early on I went to this incredible Pashtun novelist, Mustafa Salik, who is a bestselling novelist in Afghanistan and works for the BBC in Pashto. With the question of the sanctity of the poems in mind, I asked him, "Aren't you worried? They've been posted on Facebook and such." And he said, "Just the opposite. This is a folk form; they survive and thrive as people share them."

It's important to understand that violent Islam is only one face of violent religion.

I was surprised by the level of sophistication of the Special Operation forces. Among them were anthropologists and PhD candidates. I felt because I understand the patterns of nineteenth-century jihad in West Africa that I was definitely going to be more advanced than they were in comprehending what the militant rallying cry was.

The most dangerous thing I've ever encountered was a run-in with Boko Haram around 2007 in a small town in Nigeria. I got caught along with the photographer I was working with, the same one I worked with on the Afghanistan book, Seamus Murphy. We were caught in an attack by a mob after Friday prayers. And the level of violence was so extreme. It was more violent than any other mob violence I have ever seen.

In most of the world, poetry has such a different reputation than it does in Western culture.

I can't imagine how Afghanistan's fall isn't going to be ten times faster than Iraq's.