Book Review: The Substantive Law of the EU: The Four Freedoms, by Catherine Barnard. (Oxford: Oxford University Press, 2004) - Common Market Law Review View Book Review: The Substantive Law of the EU: The Four Freedoms, by Catherine Barnard. (Oxford: Oxford University Press, 2004) by - Common Market Law Review Book Review: The Substantive Law of the EU: The Four Freedoms, by Catherine Barnard. (Oxford: Oxford University Press, 2004) 44 2 Common Market Law Review