Rivets I have never published a book.
But I have been involved with manuals.
We also had someone that was very attentive with layout and fonts etc.
As soon as the printers got near it they stripped all of it off. And then redid it with there universal text. And then when they printed it the fonts samples appeared and then you get to choose.
Also most ebooks allow you to change the fonts on the reader so i presume that the text is sent in a generic form then the ebook applies the font locally.