If I read what you wrote correctly, you are having a problem with bolding on all text in ePubs with NO embedded fonts. Your CSS looked good, BTW. I'm not familiar with PRS+, so I'm wondering if there is a setting within it that turns everything
Bold. I know there is a least on iOS or Android reader app that has such a setting. If so, that could be the problem. Another thing to check besides spelling of font names (which was already mentioned above) is that the font files themselves are actually all in the
fonts folder.
If this problem is occuring across multiple ePubs, then the issue might not be related to the ePub CSS. However, you might check the CSS for one of the ePubs just to verify that there are no
font-weight: bold; attributes in any key tags such as the
body or
p tags.
One other thing: I would get rid of this statement in the CSS:
Code:
.calibre {
font-family: "Charis", serif;
}
You only need the
font-family attribute in the
body tag. When it is in the
body tag it will be inherited by all other tags/classes.