I agree with the previous comment that the literary style, the mannered run-on sentences, is annoying. That said, the pacing was excellent, and I enjoyed the juxtaposition of the two narratives, the men discussing war within their walls of books, and the two lovers. I thought he sewed them together very effectively.
As for visceral response, the narrator's excitement and urgency came across, but the sex wasn't particularly hot. I didn't have the impression that that was really the point.