Despite her complete dominance of the daytime talk show field, Oprah Winfrey had not given up her acting ambitions. In 1998, she produced and starred in the feature film Beloved, adapted from the book by the Nobel Prize-winning American author Toni Morrison. Winfrey has long used her television program to champion the works of authors she admires, including Morrison, and her longtime friend Maya Angelou. Her influence over the publishing industry exploded when she began her on-air book club in 1996. "Oprah Book Club" selections became instant bestsellers, and in 1999 Winfrey received the National Book Foundation's 50th anniversary gold medal for her service to books and authors. She herself has authored five books. A proposed book on weight loss, to be co-written with her personal trainer, has received a publisher's advance fee reported to be the highest in history.