Quote:
Originally Posted by Quoth
You can specify a font in CSS and not embed it. You can't use CSS to say where it is if it's not embedded.
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It is possible to add CSS to an epub which points to a font which is sideloaded on the device rather than embedded. But it does depend on which device/reading app you're using.
For example, it can be made to work on a Kobo for an epub but, (
as of quite recently), not a kepub. I believe it also works in KOReader (at least on a Kobo or in Android) without adding any CSS @font-faces at all.
The necessary CSS is unlikely to ever be seen in retail books but you can add it yourself for your own books. I've been doing it for years.