Mark Twain (November 30, 1835 - April 21, 1910) was the pen name of Samuel Langhorne Clemens, an American writer, humorist, entrepreneur, publisher, and lecturer widely regarded as the "father of American literature". His most famous works include The Adventures of Tom Sawyer (1876) and Adventures of Huckleberry Finn (1884), the latter often called the "Great American Novel".