importance to the movement. Graham Harman provides a balanced but critical assessment of his original SR colleagues - Ray Brassier, Iain Hamilton Grant, and Quentin Meillassoux - along with a clear summary of his own Object-Oriented Ontology (OOO). A number of central philosophical questions tie the four chapters together: What exactly is "correlationism," the chief enemy of SR? What are the stakes of philosophical realism, and is such realism better served by mathematics and the natural sciences, or by a broader model of cognitive activity that includes aesthetics? This book covers both the historical and conceptual development of the movement, providing a first-rate introduction for students, aided by helpful end-of-chapter study questions chosen by Harman himself. SR, Harman shows, is a vital and fast-developing field in contemporary philosophy.