Nelle Harper Lee (April 28, 1926 – February 19, 2016) was an American novelist whose 1960 novel To Kill a Mockingbird won the 1961 Pulitzer Prize and became a classic of modern American literature. She assisted her close friend Truman Capote in his research for the book In Cold Blood (1966). Her second and final novel, Go Set a Watchman, was an earlier draft of Mockingbird, set at a later date, that was published in July 2015 as a sequel.