Finishing off the Huck Finn sequel, Tom and Huck Among the Indians, is I'm
sure an interesting and enjoyable exercise and certainly an almost
irresistible challenge for a true Twainiac. I find more interesting,
however, conceptualizing (and writing at least part of)an original sequel.
I'm surprised that more haven't tried it. The only one I have come across is
Greg Matthews' Further Adventures of Huckleberry Finn.