Here's a short radio interview transcript and here's a newspaper profile. A tidbit about his method:
"I'm not a great reader of history, but I like plundering books for the interesting bits," he says. "Where all the information is so remarkable and entertaining that there is no effort involved in reading it – I admire that. You've got to keep people interested, and interested in things they might not think they're interested in. Maybe people who don't care about slavery might want to read about Brazilian cuisine. One employs the arts of seduction."