This ambitious study examines political change in Norway to offer more general lessons on the evolution of representative democracy ‘after the mass party.’ Using an unusually rich trove of longitudinal data on Norwegian voters, MPs, conference delegates, and party members, it thoughtfully investigates how—and whether—party organizational change affects congruence between MPs and those whom they represent. This book’s lively engagement with widely-shared theoretical assumptions, and its careful empirical work, make it recommended reading for everyone with an interest in the evolution of political parties in contemporary parliamentary democracies.