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What do you use to track your reading?
(beehaw.org)
Pretty straightforward: books and literature of all stripes can be discussed here.
If you're interested in posting your own writing, formal or informal, check out the Writing community!
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
I've used LibraryThing.com for years. Initially it was to maintain my personal library, but it has lots of ways to get recommendations that I love. It doesn't feel as much like social media, more a place to keep a catalogue, but there are social aspects. (Forums, friends, & comparing libraries.)