If you actually want epub on a kindle, they released a new jailbreak a bit ago. Shipping stock of kindles are probably vulnerable. You can then install koreader: https://koreader.rocks/

https://www.mobileread.com/forums/showthread.php?t=346037

Even better, Kobo ereaders supports it natively and aren't locked down. They're great. Much better experience than koreader on a unlocked kindle.

https://us.kobobooks.com/collections/ereaders

I have a 2014 Kindle Voyage, bought it early 2015 and it still functions really really well. Although I was starting to feel its age given that I had to connect it to the computer manually to transfer books for calibre... but I have jailbroken it and installed koreader and it truly feels like a perfect device.

Wireless transfers of epubs is just a marvel. Now the only thing holding me back is that it's a micro usb device instead of USB C but damn. I really love this machine.

Only minor bug is that the hardware buttons don't work well in koreader after sleep, but exiting and re-entering the application fixes it; annoying but I don't really care enough to do something about it.

I finally upgraded to the latest paperwhite, and the orange lighting and consistency of the lighting is so good, it's a worthwhile upgrade. Pick one up during the next sale.

See? Major corporations always listen to their customers. It's been merely ten years since we asked and they are showing support!

> I think Amazon will likely use their own EPUB system, and maybe called it AEPUB.

God, I hope not. That just invites one more opportunity for Amazon to take an existing standard and shit all over it with some proprietary bits and nigh-unbreakable encryption, leaving it increasingly difficult to convert Amazon books out of their ecosystem.

Wouldn't be surprised, Kobo kinda did the same with kePub, although they do support standard ePubs too.

This isn't the same as Kindle supporting ePub. How did they get the story so wrong from the linked support article (which isn't an announcement)? Oh, right it's Goodereader who sucks. I'm 90% sure Amazon is converting ePub when you email through their document service to KFX or AZW3 for you. You could already sort of do this before by changing the extension to .PNG but sometimes it would fail anyways.

What I do now, I gather some 10-20 EPUBs purchased from different sources, then batch convert them to MOBI using Calibre.

Then I add them as attachments to my mail and use Send-To-Kindle. The MOBI files are barely hundreds of kilobytes, and I can fit about 20 books in a single email.

This is exciting. Although it's not 100% EPUB support like the title claimed, allow sending AZW3/KFX is huge. I'm building a product to allow reading online content on Kindle and MOBI conversion kills the formatting sometimes.

And canceling transferring mobi, what? No mention of library books support.

Mobi is an ancient terrible format. It doesn't support a lot of features that their newer formats like KFX and AZW3 do. You shouldn't be getting a Mobi from anywhere these days since it's been replaced two times over and you can now send ePub. This only for Kindle Personal Document service and Send to Kindle too.

Tricky bit.. I can't send ePub over usb cable. It doesn't work on my kindle.

Yeah but you can send AZW3 or KFX over USB and convert ePubs to those in numerous ways (e.g. Kindlegen, Calibre). Mobi is old, and is missing loads of features that the other formats support. With the Kindle Personal Document service for a while they only supported mobi but not AZW3, KFX or ePub which necessitated using crappy mobi if you wanted sync across devices. There's really no reason to use mobi anymore unless that's the only format you have it in. And there's pretty much zero loss converting mobi to AZW3 unlike the other way around.