As an atheist and lapsed Catholic, I feel the absence of faith in my own life quite acutely.

I know well what faith really means to people in their daily lives, as there are many people in my family whose lives are permeated by their faith: it dictates the way they behave and sustains them in tough times, of which we've had too many lately.

I haven't written a whole lot of nonfiction, but what I have written leads me to believe that it's an entirely different muscle. The ongoing paradox is that sometimes it's harder to get to the emotional truth of something when you only have the facts at your disposal.

People have invoked the ghost of Hemingway quite a few times in writing about the book. I could get into sticky territory here if I let myself go on about this subject. The more I hear it, the more it rankles, frankly.

On a micro level, if we're not terribly lucky, this sort of thing can happen to us quite frequently - the political becoming the personal in dramatic and irreparable ways. I remember the first time I went out into the desert, passing by all these mine fields and getting the history on them from my guide and realizing all these murderous mechanisms were real, were just sitting out there waiting for a victim, and some of them had been for sixty, seventy, eighty years.

Singularity theory is something that I do believe will come to pass, sooner or later, although whether or not in our lifetime I don't know, and I'm not sitting around waiting for my father to be resurrected. Readers probably have the impression from the book that I'm a lot more a of a techno kook than I actually am. It became a convenient fulcrum in the story, sort of a kaleidoscope through which to address religious and spiritual questions.

Regardless of whether you believe in the Singularity, you will most likely experience the benefits of it. But we don't really know.