Hah, well then, maybe I just don't like vampires! In all seriousness, I thought I had seen it in a list of "top hard sci-fi books" awhile back and a quick Kagi

Hah, well then, maybe I just don't like vampires! In all seriousness, I thought I had seen it in a list of "top hard sci-fi books" awhile back and a quick Kagi search seems to imply that a lot of people seem consider it hard sci-fi for whatever reason. Maybe this means there's still a chance for me.