When I finished my trilogy, I went back and gave my first book another pass. There were a lot of little details that crept into the series by the end that just were not addressed or did not exist when I wrote the first book. I'm also on my third cover in four years for the first book too. One of the advantages we have over traditional publishing is our ability to quickly modify our work until we do get it right. Our careers are not beholden to the old 30-90 days on the bookshelf and you either make it or you are done in this business. I honestly don't plan on revisiting the series again, but who knows.