Incidentally, at one point you will see that Smashwords asks for an ISBN, which I don't have. Apparently Smashwords will give you an ISBN free but they become the publisher of the book at that point. I am considering whether this is my best move. I'm not keen on ISBNs and how they affect the tax status of your book-shaped objects/data but apparently two of the major platforms won't accept e-books with no ISBN. Meanies.