Mark Twain is widely considered the author of the first great American novel—The Adventures of Huckleberry Finn—but his rollicking tales aren’t the only legacy he left behind. Mark Twain is a nautical reference. Where Mark Twain picked up the name has long been debated. In addition to being a steamboat pilot, Mark Twain also worked as a miner. It took Mark Twain seven years to write The Adventures of Huckleberry Finn.