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Derell Licht · 01-08-2020, 03:22 PM

Before I get into details, let me note that I am using Windows 7 64bit,
so I am using Calibre 64bit V3.48, which is the last which supports Windows 7.

I recently got the new Oasis 10th gen, which is *very* beautiful. I installed a few custom TrueType fonts in the fonts directory, and they work great with azw3 and mobi books from Amazon.

However, I have many epub books from external sources, and have been using Calibre to convert them to mobi and transfer to my Oasis. Sadly, most of those .mobi files do *not* support custom fonts.

I also tried converting one of the files to azw3 ... this was an adventure!
If I convert from .epub to .azw3 directly, I cannot change fonts at all...
However, if I convert epub -> mobi, then mobi -> azw3, custom fonts *do* work. Line spacing is a little irregular for some reason, but I can live with it.

What I'm hoping to find, though, is some way to either make the .mobi files work (with custom fonts) as they do when I get them from Amazon.

So does anyone have any insights into how I might address this issue?

01-08-2020, 03:22 PM	#1
Derell Licht Member Posts: 12 Karma: 10 Join Date: Jul 2016 Location: Fremont, CA Device: Kindle Paperwhite Signature Edition	Oasis, mobi, custom fonts oddities Before I get into details, let me note that I am using Windows 7 64bit, so I am using Calibre 64bit V3.48, which is the last which supports Windows 7. I recently got the new Oasis 10th gen, which is very beautiful. I installed a few custom TrueType fonts in the fonts directory, and they work great with azw3 and mobi books from Amazon. However, I have many epub books from external sources, and have been using Calibre to convert them to mobi and transfer to my Oasis. Sadly, most of those .mobi files do not support custom fonts. I also tried converting one of the files to azw3 ... this was an adventure! If I convert from .epub to .azw3 directly, I cannot change fonts at all... However, if I convert epub -> mobi, then mobi -> azw3, custom fonts do work. Line spacing is a little irregular for some reason, but I can live with it. What I'm hoping to find, though, is some way to either make the .mobi files work (with custom fonts) as they do when I get them from Amazon. So does anyone have any insights into how I might address this issue?