For fiction books (and some nonfiction) there is good "rotten tomato for books" https://bookmarks.reviews/ https://bookmarks.reviews/ there is not a lot of dis

For fiction books (and some nonfiction) there is good "rotten tomato for books" https://bookmarks.reviews/ https://bookmarks.reviews/ there is not a lot of discussions there, but maybe it satisfies your need. I wish there was something like this for business books