I have many ebooks I have from scouring the Internet in two formats: epub and PDF. I want something server like that lets me drop read them from any device on my local network and remembers where I left the book on device and let’s me continue on another. I want the client app to have android and Linux support while the server should run on linux. Is there anything out there? Bonus points if it autographs metadata from the internet and organises them by topics, authors, ddc etc.
TLDR: An ebook library running on a Linux server with Android and Linux client software.
I don’t know if this will fully meet your requirements, but my combination, which I’m happy with, is Moon Reader Pro on my Android devices and Ubooquity on my server.
Moon Reader has a Sync to WebDAV option but I haven’t needed to use it. If you’re not inclined to pay for an ebook reader software, there is also Librera which is free.