Calibre allows you to maintain a library of you ebooks and sync it with devices (including Kindle). It is also able to convert the ebooks to all formats you need.

I mostly use it to get ebooks from z-lib and put them on my Kindle. But it works the other way around, too.

You can create a Virtual Private Network (VPN) for just yourself. This way you can connect to the server as it is in your home network.

To be able to do this, you have to install a VPN server (like Wireguard or OpenVPN on your seed box).

To connect to the server you can then use SSH if you run a Linux server.

libgen.rs is imo one of the best sites for e-books. Until now I found everything I needed.

You get an IPv6 prefix from your ISP. This way you have thousands of public addresses for yourself, but they still can identify you by the prefix.

Maybe even better as with IPv4. Because nowadays most people have DualStack Lite which means you have unique public IPv6 addresses but only a shared IPv4 address.

Should definetely be about superb owls