With a brief history of the field and its major concepts, Giles (U. of California, Santa Barbara) and other communication scholars introduce 22 chapters that present current theoretical perspectives and empirical evidence on how social identity and intergroup processes shape communication. International contributors discuss how group membership and contexts affect ordinary and online communication; how real and perceived differences between groups have resulted in stigmatized identities and deadly conflicts; and methods to improve communication (e.g., the ASPIRe model). The book is an update of Harwood and & Giles' Intergroup Communication: Multiple Perspectives (Peter Lang, 2005). Annotation 穢2010 Book News, Inc., Portland, OR (booknews.com)