...this confuses me. So...it's like tumblr...for books?
Either way, I'm mainly on Goodreads. I do occasionally come here, and also do periodically import my shelves from GR here, but GR is a more sure bet for contacting me.
I'd actually read this one yesterday, so I suppose this one was the beginning of the menage run. (I've noticed that when there's some salient feature of a book, I tend to see it again and again for the next couple of books [at least three]. Once it was facial burn scars. Another time was dead lovers. I suppose this time it's menages. I have absolutely no idea why it happens - I generally pick books out of my unread ebooks folder more or less at random - but it does.)