Mark Twain was an American author and humorist born in 1835. He is known for his witty and satirical writing, which often commented on social issues of his time. Twain is best known for his novels "The Adventures of Tom Sawyer" and "The Adventures of Huckleberry Finn", which are considered American literary classics. He also worked as a journalist, lecturer, and inventor, and was involved in various social and political causes. Twain's writing continues to be studied and enjoyed today for its humor, realism, and insight into American society. He passed away in 1910, but his legacy as one of America's greatest writers lives on.