Question: Toni Lopopolo is a literary agent whose book publishing career began in 1970 in the publicity department of Bantam Books, where she helped publicize authors such as which English author of romance novels, one of the best-selling authors as well as one of the most prolific and commercially successful worldwide of the twentieth century, with her 723 novels were translated into 38 languages and she continues to be referenced in the "Guinness World Records" for the most novels published in a single year in 1976?
Answer: Barbara Cartland