Bought the book by Liz Castro but haven't started on it yet.
@Doitsu
Looked at your sample epub; the text in the xhtml file is rendering perfectly but the Table of Contents is not (at least, not in Sigil)... the vowel signs have shifted position and the ligatures are not displayed at all; rather they're showing up as individual letters accented by the 'halant'... from what I've been reading, this is probably a problem with the rendering engine...
Will look into it and keep everyone updated.
Sincerely appreciate all the responses
Nabodita