We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Linux, LyX, and ePub
Has anyone had the fun of creating an epub 2 ebook using source from Lyx?
I've successfully used Lyx to produce a respectable pdf (currently in print) and it would be nice to offer it also as an epub. I can do it by hand, but I really don't want to - and the epub software I'm writing at present is not yet at that level of operation.
There does appear to be some action on an epub export filter on LyX but it doesn't look finished yet. Other possibilities are perhaps Sigil (tricky sometimes in Linux) or the Calibre epub generator.
Word is not an option; I'm a Linux user. It may be possible to do this with LibreOffice and the appropriate Word format output.
The text has no images, but it uses bullet points internally and multi-level titles (chapter, section, subsection) which I would prefer to keep as links. No fancy fonts.