Who is the narrator of The Adventures of Huckleberry Finn?

The narrator of this novel is Huck Finn himself.  He is a young boy without a mother and whose father is considered the town drunk (when he's around at all).  We learn a lot about Huck Finn in just the first few paragraphs of the novel.  He tells us who he is, but also mentions the book is being written by Mr. Mark Twain, who also wrote Tom Sawyer - so, from the beginning, we are directly told that the events will come from the pen of Twain through the mouth of Huck Finn.  Being twice removed from the story gives it a hint of question-ability which is increased when Huck confesses that Twain did tell some 'stretchers' in the first book - leading us to believe he could tell some 'stretchers' in this one as well.  Huck goes on to give us other info, such as his negative views of religion, civilization, and eventually slavery.  Because the novel comes from supposedly such a young perspective, the reader easily accepts Huck as innocent and honest making easier for Twain to express his message through his narrator.