Judith Krantz, who almost single-handedly turned the sex-and-shopping genre of fiction into the stuff of high commerce, making her one of the world's best-selling novelists if not one of the most critically acclaimed, died on Saturday at her home in the Bel Air section of Los Angeles. She was 91.

Her publicist, John Tellem, confirmed the death.

Though she did not publish her first book until she was 50, Krantz reigned for decades afterward as the international queen of poolside reading. Her 10 novels — beginning with Scruples in 1978 and ending with The Jewels of Tessa Kent in 1998