Mark Twain was a famous 19th century American author known for embracing American individualism in his works. He published over 30 books in his lifetime that explored themes of freedom, equality, and challenging social restraints. His most famous works, The Adventures of Tom Sawyer and Adventures of Huckleberry Finn, told stories of young boys rebelling against societal norms and pursuing their own paths. Through his characters' struggles with issues like slavery and injustice, Twain advocated for individualism and equal treatment under just rules. To this day, he remains one of the most studied authors in America for his expression of ideals central to American identity.