Book Review: Between Flexibility and Disintegration. The Trajectory of Differentiation in EU Law, edited by Bruno De Witte, Andrea Ott and Ellen Vos. (Cheltenham: Edward Elgar Publishing, 2017) - Common Market Law Review View Book Review: Between Flexibility and Disintegration. The Trajectory of Differentiation in EU Law, edited by Bruno De Witte, Andrea Ott and Ellen Vos. (Cheltenham: Edward Elgar Publishing, 2017) by - Common Market Law Review Book Review: Between Flexibility and Disintegration. The Trajectory of Differentiation in EU Law, edited by Bruno De Witte, Andrea Ott and Ellen Vos. (Cheltenham: Edward Elgar Publishing, 2017) 55 3 Common Market Law Review