@skreutzer: Two other Open Source projects, recently announced ePub support:
AbiWord 3.0
Calligra Author 2.6
But, as is all too common in the Linux world, both projects have
not released any Windows binaries thus excluding about
90% of all potential users.
It'd be great, if you could create Windows builds for these projects. You could also either join the development team of these projects to further your ideas or create a customized version that encourages using styles instead of direct formatting.
However, before you proceed any further, it couldn't hurt to ask authors:
- what tool they actually use for writing books (Word, Jutoh, AWP, Scrivener etc),
- why they don't use Sigil,
- what authoring features they'd like to see implemented etc.
(You can create a poll in the
Writer's Corner forum.)