[diggan]

Gave Books a quick try, hardest part was probably how to send files from Linux to iOS, but thanks to ifuse it ended up being pretty easy, by (ab)using Chrome's download directory. Still haven't found a way of importing them into Books automatically, but better than nothing I suppose.

In case others are in the same situation, I ended up doing something like this:

    idevicepair pair
    mkdir ~/iphone
    ifuse --documents com.google.chrome.ios ~/iphone
    cd ~/iphone
    cp /home/user/books/*.epub .
    cd ~
    fusermount -u ~/iphone

Then use Files app on the phone, navigate to the Chrome documents folder and click on the .epub file and after ~5 seconds or so it opens up in Books, and after that it's accessible via Books directly.

[selykg]

I usually just have mine in the Safari downloads folder. Then use Files to open them.

If you’re on Linux, using iCloud to add files there should be easy enough as well. Then I just added them as I needed them. I’m on a Mac though so it’s a bit easier.

Sounds like you found a solution though.