This is the first comprehensive analysis of how Sinn Féin has transformed itself from ‘political wing’ of the Republican movement to a mainstream force in Irish politics. In this book by one of Ireland’s leading political journalists, Deaglán de Bréadún provides an incisive account of how the party has arrived at a position, in the space of one generation, where it is in power north of the border and knocking on the door of government in the south. Despite recent controversies and scandals arising from alleged sexual abuse by republican activists, and the violent legacies of the Troubles, the party has maintained its popularity. The outsiders have now become insiders in the political game. How did this dramatic transformation come about? Based on detailed research as well as interviews with a wide range of figures inside Sinn Féin and across the Irish political spectrum, Deaglán de Bréadún unveils a fascinating and indispensable analysis of a party that has come in from the cold. The book also draws on the author’s experiences covering the Northern Ireland peace process as well as politics in the Republic for many years, to reveal the most fascinating and unmissable political story of 2015.