If you're a reader, you've either heard of or joined "GoodReads". It's owned by Bezos (part of Amazon's book selling thing) and there is now an alternative to it:
"Bye, Bezos: People Are Leaving Amazon’s Goodreads For A New Book-Reading App"
https://www.huffpost.com/entry/storygraph-amazon-goodreads-jeff-bezos_l_673e2013e4b0f17b35e0a123
Direct Link:
https://www.thestorygraph.com/