Creating and selling your own ebooks is not nearly as difficult as you might think. Most of us have experience or knowledge that could be organized into an electronic file, or e-book.
That's what the Internet is all about, isn't it? The immediate delivery of information? Sure it is, and it's growing at a rapid pace.
Every time we get online, and perform a search for anything, we are requesting information that we expect to be delivered to us immediately, whether via a webpage, website, email, or video.
Even if you don't want to create your own ebook, there are plenty of resources that allow you to purchase ebooks for a small price, and along with that purchase comes full re-sell rights. Meaning you can resell those ebooks on your website, and keep 100% of the money you make.
I've had great success with doing a combination of both writing my own ebooks, and bundling them in packages with other ebooks that I feel would be useful to the reader, and are relevant to the subject.