OK. Different font question for a different book (Brandon Sanderson's "Steelheart":
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1).
Downloaded it fresh from Amazon. Added it to Calibre and had it convert to EPUB3. Edited the epub and there's no fonts in the font section and no encryption.xml. But, in the various stylesheets, there are 3 sets of fonts listed (free font sans, serif and mono (4 versions each)). All of them are listed in the stylesheet with:
Code:
src: url(XXXXXXXXXXXXXXXX);
and none show in the OPF or anywhere in the book.
Are these those obfuscated fonts I keep reading about?