In the late 1850s, a young man named Samuel Clemens started out piloting steamboats on the Mississippi River. Within a few years, he embarked on a writing career, adopting the pen name that became famous: Mark Twain. Armed with a wry sense of humor and a natural flair for storytelling, Twain gained wide acclaim for his short stories, travel sketches, and novels. In 1885, he published The Adventures of Huckleberry Finn, a story of two runaways on a quest for freedom. It would become one of the most celebrated, and controversial, books in American literature. But at the height of his popularity, his risky business ventures and his critiques of American policy abroad threatened to ruin his legacy.