Simple, a blog that you pay to read. :) It's amazing to me that people still continue to pump out books, such an outdated form, simply because it has an existing payment model in place, rather than trying new paid models online. Simply churning out ebooks or the equivalent is all they do, when so much more is possible online, everything from pay-per-post to comments. The lack of imagination is simply stunning.
I agree. A website / blog allows links to videos etc. and it can be expanded over time, and indexed by search engines.
Have you considered using LeanPub for this?
