I do most of my volume through e-book reader sales like kindle. A lot of people do this whole "launch formula" thing with e-books, but I've never tried that, I just pick topics that gets decent google juice and let organic search bring in people to the sales site. I also pick topics that aren't covered, or at least not well cover, on amazon and the like.
I have seen the typical affiliate style 'how to make $100 a day on autopilot from adsense' e books around for a while and sold via click bank and the like. I take it yours are more mainstream?
Are you then saying that your sales channel is Amazon and selling PDF/kindle books. Any examples your willing to give of one of your titles?
I've recently started working on a book that I intend to sell via Kindle. Any gotchas, pointers, things-you-wish-you-had-known and etc will highly be appreciated?