The Sacred Selfishness of Sinn Féin by Ernest Augustus Boyd is a study of the role and influence of the Irish nationalist Sinn Féin movement on the Irish political and historical scene. In this work, the author examines the moral and ideological aspects of the aspirations for self-determination and autonomy of the Irish nation through the lens of the concept of sacred egoism. Boyd analyzes the roots and values behind Sinn Féin's drive for independence, deepening understanding of the history and historical circumstances that fueled the Irish nationalist movement. This book will be an interesting resource for anyone interested in Irish history, political movements and nationalism.