Thanks for your reply AM.

I tried emailing the mobi to my kindle account, but when viewed on the ipad app its the same (stripped of fonts). Also, I am looking at it with Publishers Fonts enabled.

I have now created a single page test of sans serif fonts which includes the title page paragraph styles of the book below that.

When output as an epub, all looks great in ADE. Once converted to a MOBI in Kindle Previewer, all looks well. But once I email the MOBI to my Kindle account (to view on the ipad) or upload it through KDP, it still strips all the sans serif fonts!

Here is a link to the test EPUB and MOBI file: https://www.dropbox.com/sh/dkveqtmuw83pkza/-OUFUOi48F

I just can’t think of anything else thats causing it.

It would be wonderful if someone can take a look and see what might be up. Its a small single page document with all fonts named.

Thanks.