7. We need *all* the ebooks.

And the number of people who wrote to me to tell me about how much they dug the ebook and so bought the paper-book far exceeds the number of people who wrote to me and said, "Ha, ha, you hippie, I read your book for free and now I'm not gonna buy it."

OK, so ebooks *are* marketing: that is to say that giving away ebooks sells more books.

You can't read an ebook without power and a computer *

The more you constrain an ebook's distinctive value propositions that is, the more you restrict a reader's ability to copy, transport or transform an ebook the more it has to be valued on the same axes as a paper-book.