Mark Twain, born Samuel Langhorne Clemens in 1835, was a famous American author who wrote many classics including The Adventures of Tom Sawyer and Adventures of Huckleberry Finn. After his father died when he was 11, Twain held various jobs and traveled extensively throughout the Midwest and East Coast. He married Olivia Langdon in 1870 and they had three daughters together. Twain died in 1910 due to heart failure.