@David Snyder said:
Plex is, and let’s all hope always will be, only for video & audio.
Uh…HA! Nope.
Plex also serves up images, which is only one step away from ebooks.
(Not even ONE step, when you consider that the PDF format was created for printing of documents, including images, and that many images are text-based formats, such as SVG, DFX, AI, CDR, GEM, HPGL, HVIF, MathML, NAPLPS, ODG, POV-Ray, PPT, VML, WMF/EMF, Xar, XPS.)