Nick Harris, a longtime literary agent who co-founded the Story Foundation, has died of cancer. He was 49. ICM Partners said Harris died May 22 at his home in Los Angeles. After graduating law school, Harris began his career at AP Watt in his native London. After moving to L.A., he joined RWS Literary Agency in 2006 and became a partner. In 2009, he left for Mosaic, where he became a manager with Jimmy Miller and represented writers and literary properties. A year later…