Mark Twain, born Samuel Langhorne Clemens in 1835 in Florida, Missouri, was an American author and humorist. He is best known for his novels "The Adventures of Tom Sawyer" and "Adventures of Huckleberry Finn," which are celebrated for their vivid depictions of life along the Mississippi River. Twain's writing style was characterized by its wit, satire, and social commentary.

Twain began his career as a typesetter and printer’s apprentice before becoming a riverboat pilot on the Mississippi River. His experiences on the river provided him with material for his early writings and helped shape his understanding of American society. After the Civil War, he turned to journalism and became a successful lecturer and writer.

One of Twain's most famous works, "The Adventures of Huckleberry Finn," is often considered one of the Great American Novels. It tells the story of Huck Finn and Jim, a runaway slave, as they travel down the Mississippi River. The novel is renowned for its exploration of themes such as race, morality, and individualism.

Throughout his life, Twain was known for his wit and his ability to critique societal norms. He was also an advocate for human rights and social justice. His influence on American literature cannot be overstated; he is recognized as one of the most significant writers in American literature.

Mark Twain passed away in 1910 in Redding, Connecticut, leaving behind a legacy that continues to inspire readers around the world with his insightful observations and humorous storytelling.