It plugs into #opendata sources: #Wikidata, #OpenLibrary and #OpenStreetMap (OSM integration is very basic at this point). Still a long way to go but we have a small community and lots of reviews already. On GitHub at: https://github.com/eloquence/lib.reviews - IRC: #lib.reviews on irc.freenode.net - Matrix: https://matrix.to/#/#lib.reviews:matrix.org
Also libReview, take a look at https://inventaire.io/welcome developed by Maxime, also using opendata, being free etc. and being some kind of online libary
(but propably you know each others already)
@lib_reviews @paulfree14 we will be working at integrating reviews within inventaire somewhere in the coming year https://trello.com/c/uwdkvGl1/114-book-reviews , that could be worth having a look together on how to integrate lib.reviews :) do you have an API with which we could request reviews by Wikidata id?
@astro Yes, this is true; however, it does not include reviews (only ratings), and is licensed in restrictive terms (non-commercial use only, which generally does not qualify as "open data" under any common definition). lib.reviews is fully open (CC-0 for data and code, CC-BY-SA for reviews).
Unfortunately IMDB's restrictive licensing means we can't use it for metadata (while lib.reviews is not commercial, we do want to make sure that the data is fully re-usable, similar to Wikimedia's policiies)