'The editors have assembled an impressive cast of scholars from the very forefront of research on social identity and social categorization processes. These scholars have turned their collective gaze on the domain of work, mining rich insights on topics ranging from motivation to diversity and group decision-making to leadership. The result is a set of very penetrating and elegantly rendered essays that are exceptionally well-grounded in the social identity and social categorization literatures. This book is simply a must for organizational scholars and students alike.' - Blake Ashforth, Arizona State University