Andrea Cagan is an American writer and biographer. She has edited, and collaborated on more than fifteen books, including biographies of Diana Ross, Grace Slick, Joan Lunden, and Prem Rawat. She has brought seven books to the best-seller lists, including three New York Times #1 best sellers and one Los Angeles Times #1 best seller.In the early 1970s Cagan appeared in The Hot Box (1972) and Captain Milkshake, an anti-Vietnam War film made in 1969 that saw a revival in 2003.