Nelle Harper Lee was an American novelist who wrote the 1960 novel To Kill a Mockingbird that 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 novel, Go Set a Watchman, has been confirmed to be an earlier draft of Mockingbird but was published in July 2015 as a sequel.