MobileRead Forums - View Single Post - non-kindle unlimited books not opening

sherri0629 · 10-19-2025, 10:42 PM

After digging through my On Device list in calibre, the books that loaded as mobi will open. But the majority of the books that loaded are azw3 and will not open. And the kindle unlimited books will load. I was reading the kindle earlier today and then it just stopped opening books.

I did remove a few azw3 books and converted them to mobi and reloaded them. Now they will open.

I'm hoping this is a fluke or maybe a setting somewhere that got changed. Or has Amazon decided to start controlling where you get your AZW3 files?

Is there a setting in calibre that will auto convert the files to mobi when I send the books to kindle rather than azw3?

10-19-2025, 10:42 PM	#2
sherri0629 Junior Member Posts: 8 Karma: 10 Join Date: Jun 2025 Device: kindle 2024	After digging through my On Device list in calibre, the books that loaded as mobi will open. But the majority of the books that loaded are azw3 and will not open. And the kindle unlimited books will load. I was reading the kindle earlier today and then it just stopped opening books. I did remove a few azw3 books and converted them to mobi and reloaded them. Now they will open. I'm hoping this is a fluke or maybe a setting somewhere that got changed. Or has Amazon decided to start controlling where you get your AZW3 files? Is there a setting in calibre that will auto convert the files to mobi when I send the books to kindle rather than azw3? Last edited by sherri0629; 10-19-2025 at 10:46 PM.