Mark Twain (1835-1910) was the pen name of Samuel Langhorne Clemens, arguably the greatest humorist the United States has ever produced and the author of travel narratives and nove...view moreMark Twain (1835-1910) was the pen name of Samuel Langhorne Clemens, arguably the greatest humorist the United States has ever produced and the author of travel narratives and novels that have shaped American literature. His most famous books include The Adventures of Tom Sawyer and Adventures of Huckleberry Finn.view less