I usually download ebooks from Anna’s Archive and transfer it to my Kindle through the service. But 1/10 times it fails, with no apparent reason. The particular ebook in question is https://annas-archive.org/md5/e310a253a9d85992129cc2b8dd351556. What’s the way out?
You don’t have to convert to mobi anymore. The Kindle backend supports epub for a couple of months already. I’ve also read reports that Kindle’s can now convert ePub by themselves if you copy ePub files via cable but I haven’t verified that myself.
It supports attempting to convert them to their own format, it doesn’t natively actually read the file as is so sometimes still easier and less opaquely buggy to locally convert, where you can easily check the output then riffle through the depths of amazons website to find out why a auto conversion failed.
Oh that’s good to know!