I built a private Goodreads "competitor" for friends (with groups and book clubs and whatnot) using the Open Library data dumps for book/author/publisher data (

I built a private Goodreads "competitor" for friends (with groups and book clubs and whatnot) using the Open Library data dumps for book/author/publisher data (since GR APIs were too restrictive in how they could be used). They're great, easy to use, and the site behind them looks like it's run well and stable (edit: didn't realize they're under Internet Archive!). Would definitely recommend them as an alternative.