Have you always had an interest in Prohibition-era? Did the timeframe inspire the book's concept, or did the book's concept inspire an interest in doing the research?
I've always been interested in classic Hollywood films, like The Thin Man series, pretty much anything with Cary Grant, William Powell, or Myrna Loy. So I tried to incorporate those impressions of the actors into my Jake and Laura series. William Powell even appears in All That Glitters.