What is SR? This book is the first general overview of the movement by one of its original members, focusing on the aesthetic, ethical, ontological, and political themes of greatest importance to SR. Graham Harman provides a balanced but critical assessment of his original SR collegues - Ray Brassier, Iain Hamilton Grant, and Quentin Meillasoux - along with a clear summary of his own Object-Oriented Ontology (OOO).