Mark Twain signed photographA signed photograph of Mark Twain America's great novelist Samuel Langhorne Clemens (1835 1910), more famously known by his pen name Mark Twain, was a prolific and well respected American author. Noted and admired for his keen wit and satirical skills, he has been described as the "greatest American humorist of his age", with William Faulkner describing him as "the father of American literature". The Adventures of Tom Sawyer (1876) and Adventures of