'This book is a masterful account of how political forces have a lasting impact on the development trajectories of secondary school systems. Adopting a framework rooted in Rokkanian cleavage theory, Katharina Sass carefully reconstructs the historical processes that put Norway and Germany on different policy trajectories. Her contribution will fundamentally influence the way we think about the politics of education.' Marius R. Busemeyer, University of Konstanz, author of Skills and Inequality