Dr. James Hitchcock's Recovery of the Sacred is available online. Apparently it's no longer in print by Ignatius Press. Long time ago, I flipped through the book. He is an advocate of the reform of the reform, but he was also an extreme defender of the OF, rejecting the claims of traditionalists concerning the importance of the OF and how reform was implemented after Vatican II. I don't know if he has changed his tone (if not mind) since Summorum Pontificum.