Laura Kalman does a fine job of takin readerss from the end of the "legal realist" movement (as described, inter alia, in Horwitz's The Transformation of American Law 1870-1960 and Kalman's own Legal Realism at Yale) through the "process school" of Hart, Sacks, and Frankfurter and on to the present fractured state of legal scholarship. Kalman discusses how many law school professors--most of whom have the JD and nothing else--have co-opted and perhaps misused the work of JGA Pocock, Gordon Wood, Richard Rorty, and many others. In addition to describing the crisis of legitimacy that the law schools have faced (are they trainers of "Hessians" or serious academics?), Kalman also offers concise summaries of major works by Bickel, Hart Ely, Michelman, Dworkin, Amar, Ackerman, and many others. If you're looking for a single work that will familiarize with the state of the field, this is the one to read.