Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), better known by the pen name Mark Twain, was an American author and humorist. Twain is most noted for his novels Adventures of Huckleberry Finn, which has since been called the Great American Novel, and The Adventures of Tom Sawyer. He is extensively quoted. During his lifetime, Twain became a friend to presidents, artists, industrialists and European royalty.
He was the sixth of seven children. Only three of his siblings survived childhood. When Twain was four, his family moved to Hannibal, a port town on the Mississippi River that served as the inspiration for the fictional town of St. Petersburg in The Adventures of Tom Sawyer and Adventures of Huckleberry Finn. At that time, Missouri was a slave state in the Union, and young Twain became familiar with the institution of slavery, a theme he later explored in his writing.