[n4r9]

Forums per book is a good start, but I find that the groups are a bigger draw in Goodreads. They have a more personal touch and allow you to discuss broader topics and get recommendations from accounts you know and trust. For example I'm in a group called "Evolution of science fiction" and have learnt a lot from joining in their monthly novel / short story reads.

[vasanthk1125]

Do users create and moderate the group themselves? It seems like a subreddit, but for book related topics?

[n4r9]

Yep, each group has one or more moderators. Like Reddit I guess but no up/downvotes. There's some automated moderation as well - it doesn't let you post links (which is mad) and I read that at one point there was a censoring of mentions of Storygraph.