Book review: Research Handbook on European Social Security Law, edited by Frans Pennings and Gijsbert Vonk. (Cheltenham: Edward Elgar Publishing, 2015) - Common Market Law Review View Book review: Research Handbook on European Social Security Law, edited by Frans Pennings and Gijsbert Vonk. (Cheltenham: Edward Elgar Publishing, 2015) by - Common Market Law Review Book review: Research Handbook on European Social Security Law, edited by Frans Pennings and Gijsbert Vonk. (Cheltenham: Edward Elgar Publishing, 2015) 55 6 Common Market Law Review