@sundi712 said:
Seriously people this is not happening. There are more important things for Plex developers to work on, such as Plex running as a service [please implement this :-D]. Just setup a Calibre server on your own network. The interface is great (https://calibre-ebook.com)
We can dream, can’t we? 
Calibre is okay, but not great; same with Ubooquity if you’ve got a specific setup, but none compare even remotely to the potential of what PLEX could offer.
PLEX [as it stands] is primarily used for entertainment, but I think it has a lot more potential than that. I (for example) use it for entertainment purposes (Movies, TV, Music, Pictures), BUT, I ALSO use it for different things like a Tutorial/Course Database (which I edit on an individual basis) and even Workout Programs (like the BeachBody series) for other members in my family. The offering in my household is huge; we’re talking some serious terrabytes of space. The entire thing set up on a NAS, which [unless you’re amazing at programming] isn’t designed [nor even ideal] for COPS/Calibre or Ubooquity. The Book, Comic, and Magazine libraries also span many gigabytes, so it’s a major shortcoming not to have that at my disposal when I need it.
When I’m at the cottage for example I might forget a book that might be relevant to something I need to learn or understand by the time I get back, or maybe a guest is bored and would love some reading material to digest down at the beach, or sometimes I find myself teaching/educating others in schools or in a professional setting, so lending them material to review [to help them help themselves] would be a HUGE help; as it stands though, I have no way of providing or sharing what I have aggregated. Also, getting people on board with multiple systems and interfaces can be extremely frustrating and confusing for everyone; it’s much easier to have them all under one roof, even if there are better readers out there. If Plex would AT LEAST just index it all, allow tags, and allow for the sharing/downloading options, that’d be a huge win; I could even live with a prompt asking me what program I want to open it with. PLEX would have to provide VERY little for it to make a BIG difference and instantly out-do Calibre.
The magic of PLEX was never how great of a player it is, nor the ability to match carefully named files with information about the media (both of which Kodi can do fine, and as far as I can tell, it can even do books), and the magic of PLEX is clearly not its channels (which are just horrible, Kodi definitely does that better due to 3rd-party interest)… PLEX (which is an offshoot of Kodi) is great for ONE reason, and that’s “ease of access”; it’s the ability to grant you access to your media on demand anytime you have a way of connecting to your server; there is no alternative to PLEX yet to match this feature in such a wholistic and well crafted way as the PLEX team has done it…
COPS (Calibre OPDS) may let you access files remotely if you’re fortunate enough to have the right setup, but even then (given that perfect scenario), it messes up your entire library and organizes everything the way it deems appropriate, which is a MAJOR no-no if you want control over the organization of your library files and folders. Additionally, [as far as I can tell] you can’t set up a way to manage sharing/remote access with others, so that’s actually a huge downer too. On top of all that, I’ve heard it can get really slow and lags when your library gets huge, which it probably will. Given all that, Calibre is ‘cute’, but it’s severely flawed; even if the PLEX team created a half-baked solution, it’d still be more useful than Calibre [in my opinion].
I Google PLEX e-books every few months hoping there’ll be good news… but there never is. >,<