Calibre is a comprehensive book library package.

I had the server running on my Ubuntu 14.04 system about 5 years ago. From memory the Calibre web interface was a bit unpolished, however some of my phone apps could access the library for easier book access.

I recently looked at my local library again because I wanted to reread some of my favorite books. I spent some time to clean the library up, but still need to spend more time.

In any case some links to setup as a Linux server are as follows:

• From Calibre: The calibre Content server
• A bit dated from DigitalOcean: How To Create a Calibre Ebook Server on Ubuntu 14.04
• A personal source on Github: Calibre Server on Linux, based upon Nginx, but still OK.

When installing a Calbre server a key point seems to be that you install the full software package and ignore the warning / errors related to the client interface aspects of the install.