Mark Twain (1835-1910), the pen name of Samuel Langhorne Clemens, was one of the most influential American writers of the nineteenth century. Known for works such as Adventures of Huckleberry Finn and The Adventures of Tom Sawyer, Twain combined humor, regional realism, and social criticism to create a distinctly American literary voice. His works remain central to the study of American literature and culture, noted for their insight into human nature and society.