If it’s not a famous book, you may find some Goodreads reviews and if you’re lucky a Reddit post or two, but not vasts amount of online discussion like you’ll find about any passingly good series or movie.
And if you love a movie or a tv show, it is much easier to convince people in real life to also watch it, since it’s way less time consuming and not everyone even reads books, but most people watch movies.
I just think that this really sucks about reading books.
I totally relate to that but only for certain books. That why I joined a bookclub, but sadly the book club became unreliable and also scheduling conflict issues until we just ended it (well the host) altogether. I haven’t had great luck with online bookclubs it always felt empty. I like meeting in person having that community with others etc.
But otherwise I like reading alone it’s my space to relax and enjoy it or not lol.