...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.
...although from one review, this one sounds more sex-centric (damnit). I keep waiting for an m/m equivalent of Holly Black's Tithe/Ironside, but alas, either it's not dark/gritty enough or it's all sex-centric and the plot was abandoned on the wayside (woe is me)