Is It Done Yet?

They say August Wilson used to change his plays even as they were being rehearsed.  I think authors face that dilemma every day.  Is the piece I'm working on finished?  Or should I write more?

I recently finished a novel entitled The Reward of the Fool.  It's published.  It's out there in the world.  So I began writing another book.  I called it The Ruleless Manifesto.  50 pages into it, I realized that I was writing more of The Reward of the Fool.  So now the dilemma: Do I leave The Reward of the Fool as it is?  Or do I change it, perhaps angering folks who had already bought the old version?

Well, I decided to change it.  I've incorporated the new stuff into the old, and I think I have a much better final product.  I've given it to a few writer friends of mine to get their reactions, but I'm already sure it's going to press.  I just hope the early buyers don't hate me.