I ordered this for my new Kindle Touch 3G; there were problems from the beginning. I didn't know if it was the Kindle or the book as it was my first book to download on my new Kindle. It would repeatedly jump from wherever I was reading to the plot or character summary. It happened frequently and it became rather frustrating. Eventually, I contacted Kindle support; they were extremely helpful, sent me an updated version of "The Complete Adventures. . . ", however, even with that I had the same problem though a little less frequent. The support staff, when they called me back to see how the update was doing, offered to refund me and remove it off my Kindle; I agreed to this approach. The staff person suggested it may have been a book formatting problem (as there were several "books" within the "book" of "The Complete Adventures. . .) Disappointed with the book situation but thrilled with the conscientious service. I have had no further problem with my Kindle. UPDATE on Feb.6,2012: I did finish reading Tom Sawyer on Kindle and have since read Huck Finn in hardcover(from library); I thoroughly enjoyed Twain's humor and writing ability and am looking forward to reading more of his works. Doubt I will order more "books within a book" editions for Kindle reading, however. Hope this was helpful.