Show HN: Bubblin Superbooks

Very interesting! How hard is it to create a Superbook (why not simply call it a book?) on your site? I have been meaning to write a book that explains the connection between math and music visually. Looks like your site might just solve that for me. How does the authoring process work?

Hello HN!,<p>Meet Bubblin Superbooks—a social book reader for web.<p>Bubblin is <i>iPad first</i> and also offline-first; though it will work just about on any browser or device. No signup is required to read.<p>Good or bad, all feedback and recommendation is welcome. :-)