In the latest episode of KGB's non-fiction reading series, Dan Charnas read from his forthcoming book "The Big Payback: The History of the Business of Hip-Hop." Charnas' book, out next month, examines how hip-hop originated in the ghettos of 1970s New York to become one of the world's predominant pop-culture as well as a multi-billion dollar businesses. Also at KGB, Sara Marcus read from her book "Girls to the Front: The True Story of the Riot Grrl Movement Revolution." The book tells the brash story of the early '90s music and feminism that became the Riot Grrl movement.