Samuel Langhorne Clemens, better known by his pen name Mark Twain, was an American author and humorist born on November 30, 1835, in Florida, Missouri. He grew up in Hannibal, a town adjacent to the Mississippi River, which later became the setting for some of his most famous works. Twain began his career as a typesetter and subsequently as a riverboat pilot, before turning to journalism and writing, where he found his calling. His novels 'The Adventures of Tom Sawyer' (1876) and 'Adventures of Huckleberry Finn' (1884) have been hailed as significant contributions to American literature, with the latter often referred to as 'The Great American Novel.' Twain's literary style combined rich humor, vigorous narrative, and social criticism, often satirizing the societal norms of his time. 'A Double Barrelled Detective Story' (1902) showcases his flair for humor and satire, incorporating elements of mystery and the American West. Twain's writings have left an indelible mark on American literature and culture, with his acerbic wit and sharp commentary earning him a legacy as one of the most celebrated writers in American history. Twain passed away on April 21, 1910, but he remains a revered figure in literature, with his works continuing to be widely read and studied.