You certainly chose one of the more difficult Habermas titles. Many, many years ago I wrote a seminar paper in which I attempted to defend H.’s interpretation of Freud in Knowledge and Human Interests (1978 English ed.) against Adolf Grunbaum’s positivistic attack in The Foundations of Psychoanalysis: A Philosophical Critique (1984). Despite the sometimes turgid and difficult prose (problems of translation?) and his theoretical hubris, I’ve always learned much from his work. I suppose it hasn’t hurt that I’ve often found his politics congenial to mine. Law & Society readers would, I think, be interested in his Between Facts and Norms: Contributions to a Discourse Theory of Law and Democracy (Cambridge, MA: MIT Press, 1996).