This is not new. GONE WITH THE WIND was rejected by about 35 publishers. John Grisham could not find a publisher until he finally got an agent, and it took years. Be prepared to learn everything you don't already know from scratch. Using Adobe Acrobat.
Some good ones specialize in selling information products.
Others apply to selling all kinds of products on the Internet. Unless you already have experience with this or you have enough money to hire someone else's expertise, be prepared to spend a lot of time and effort in both production and marketing. Thanks for your effort to promote e-publishing. We're on the verge of seeing the world transformed by the Internet even more than Gutenberg's movable type overturned the Middle Ages in Europe. And thanks for having me as a guest on Ebook Junction.