'The Adventures of Huckleberry Finn' is a novel written by Mark Twain, first published in 1884, that follows the journey of a young boy named Huck Finn as he travels down the Mississippi River. The novel is celebrated for its vivid portrayal of American society and its exploration of themes such as race, freedom, and moral growth. As a cornerstone of realist literature, it presents an unfiltered view of life along the river, highlighting the complexities of human behavior and social issues prevalent in the pre-Civil War United States.