 This is Fresh Air. I'm Terry Gross. Let's get back to my interview with Emily Nussbaum and talk about her new book, Cue the Sun, The Invention of Reality TV. She got the idea for the book back in 2003 when she thought of reality TV as a hot new pop culture genre, a time when reality stars were bumping actors from the covers of magazines. She waited about two decades before actually writing the book, and by then she says, the deeper she dug, the darker things got.