iBook Lessons is a continuing series about ebook writing and publishing.
Folium offers a web-app based alternative to iBooks Author, allowing you to build EPUB and Mobi titles. They also can export HTML to support print-on-demand services.
Paid projects stay on the site and are archived. You can return and edit at any time. Free projects expire at the end of three weeks, at which time you lose edit capabilities. By upgrading to a paid project (US$30), you regain that access. Free projects are purged from the site after three months. In addition, you can bring your own ISBN or
