So yesterday I was in the subway, on my way to the International Center of Photography to look at vintage prints and other archives of Robert Capa, the legendary war photographer who is one of the central characters in my new book, Hotel Florida. The train was halted, for the usual inscrutable reasons, in the 59th Street station; and apparently it had stopped so that my seat was in some tiny cellphone-signal hotspot. The phone rang. Surprised, I picked it up: on the line was Judy Kinberg, di...