Hi,
From iBooks Asset Guide I read that only TTF and OTF font files are welcome in EPUBs for iBooks and iBookStore. I wonder: is that mandatory?
I just made an EPUB3 that gather the fonts needed and one of them is a .suit file, not .otf nor .ttf file. It reads perfectly on iBooks, and it doesn't provide any kind of errors in EPUBCHECK. Would it be a problem when trying to deliver it with iTunes Producer ?
As a side question: do you use to just use iTunes Producer to "validate" your EPUBs seeking possible error message, w/o the intention of sending the file to Apple right after that?
Thanks!