The major contribution of this book is that the idea of 'tribe' is fully and robustly explicated in ways that challenge existing wisdom, particularly the idea that Internet users are best understood as communities... The richness of diverse research resources is evident in every chapter. I particularly commend the editors on the international perspective and the inclusion of such a surprising array of subcultures. H. L. Goodall Jr., Director, Hugh Downs School of Human Communication, Arizona State University