This is a hell of a first article. I'm not sure why this isn't rated higher.
There are some minor things, for example, some of the dialog crosses into being overdone, but mostly your dialogue is a real strength. It sounds natural, and the characters (book included) have distinct voices.
I think it could be shortened up just a touch, and I agree the last bit might work just as well as the beginning of a tale. A more open end gives the item more chance to be explored by other writers!
All in all, I thoroughly enjoyed reading this, and I look forward to future work!