Place has always been important to me, and one thing today's Chicago exudes, as it did in 1893, is a sense of place. I fell in love with the city, the people I encountered, and above all the lake and its moods, which shift so readily from season to season, day to day, even hour to hour.

To me, writing is a very physical process. I lay out the entire book with the two narratives side by side on my bedroom floor, and just get down on my hands and knees and start looking at it in that physical space. "Does this really follow from this? Should this be here or elsewhere?" I will literally cut the paper into paragraphs. I'll cut it into segments and move the segments around from one narrative to the other until I feel that I've found the natural structure.

It was so easy to disappear, so easy to deny knowledge, so very easy in the smoke and din to mask that something dark had taken root. This was Chicago, on the eve of the greatest fair in history.

Beneath the stars the lake lay dark and sombre," Stead wrote, "but on its shores gleamed and glowed in golden radiance the ivory city, beautiful as a poet's dream, silent as a city of the dead.

I started reading the big histories and the small histories, the memoirs and so forth. At some point, I found the diary of William E. Dodd.

. . . why some men choose to fill their brief allotment of time engaging the impossible, others in the manufacture of sorrow.

Beneath the gore and smoke and loam, this book is about the evanescence of life, and why some men choose to fill their brief allotment of time engaging the impossible, others in the manufacture of sorrow. In the end it is a story of the ineluctable conflict between good and evil, daylight and darkness, the White City and the Black.