Huck Finn SparkNotes can be found online at sparknotes.com or purchased in hard copy form at Amazon.com and Barnesandnoble.com. The full title of the book is The Adventures of Huckleberry Finn.
Mark Twain (the pen name of Samuel Clemens) wrote The Adventures of Huckleberry Finn in 1884. It is a sequel to The Adventures of Tom Sawyer (1876). Neither book is very long (about 200 pages) and both are quite readable, although the modern student may find some of the language peculiar. Whether you read the full text or not, SparkNotes generally provide additional insights, identify noteworthy passages or famous quotes, and provide study aides such as a list of characters and plot summary.