i have Audiobooks working fairly well in Plex, here is what I do:
- Store audiobooks as a single m4b file (mine have chapters for when this is implemented in Plex)
- add a library and select music and point to your audiobooks
- install and select the Audnexus Agent for Audible it lets you select your audible server to match to make the matching of audiobooks fairly easy if it finds a match, the plugin also tracks your progress through the track (link below)
I find when audiobooks are stored as multiple files for each chapter there is a much greater chance of books being broken up incorrectly
if everyone can vote for chapter support I think this is the only missing feature I need… which is here