Quote:
Originally Posted by roger64
3. Still using the Calibre editor, also insert this line in the .opf file:
Code:
<meta property="ibooks:specified-fonts">true</meta>
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AFAIK, only the com.apple.ibooks.display-options.xml is required. I slapped together a quick test file with a subset version of Charis SIL, which displayed fine with iBooks 3.2. Note that it's possible for iBooks users to override the embedded fonts by selecting a different font in the iBooks font selection menu.
If iBooks users had problems with your book, you may want to attach an excerpt or add a link to the book in the Patricia Clark Memorial Library. Also ask them about the iBooks version that they were using and whether they changed the embedded font from Original to a different font.
And as HarryT has already pointed out, there are a couple of different ebook apps available for iPads, some of which ignore embedded fonts.