If your a self publisher looking to start creating e-books, this is a possible solution for you.
Self publishing out of WordPress is a simple as writing a blog post. If you are familiar with wordpress, then this will be pretty straight forward. If not, the learning curve is minimal. Keeping in mind, that WordPress is free software that can be downloaded. Once, you have created your blog [click for "5 simple steps" to create a blog], then add the plug-in PRESSBOOKS.
Here are screenshots for the 4 steps to publishing your book. This plug-in formats your text, organizes and exports your e-book...Yes, there is a small learning curve, but IMO, well worth!