The magnum opus in many respects when it comes to the research, creation, and management of interpersonal group therapy - and group therapy more generally - Irv's The Theory and Practice of Group Psychotherapy is instrumental in the instruction of clinical and/or counseling students in graduate programs.
In its sixth iteration, this book provides a detailed exploration of the 12 therapeutic factors instrumental to the effective therapeutic work in group: instillation of hope, universality, imparting information, altruism, corrective recapitulation, social technique learning, imitative behavior, interpersonal learning, group cohesiveness, catharsis, and existential factors.
The book begins with an exploration of these first six factors, then dives into more depth with the remaining ones. From there, it discusses the creation and maintenance of a therapy group - under the general interactional, interpersonal group type - along with the various and countless challenges and opportunities that must be utilized by the therapist to ensure a therapeutic and helpful experience for the group members. It finishes with unique types of groups that challenge the norms set in the rest of the book, and covers internet group therapy research and opportunities. Peppered throughout, there are various vignettes to explore and clarify a number of important aspects of group therapy, though, there are markedly fewer examples than are seen in other books by Irv, such as The Gift of Therapy, which I sorely missed. The book is filled with research to help provide substantive evidence to the efficiency and benefit of group therapy, providing all clinicians plenty of fodder against claims of its uselessness.
Among critiques, the book carries a few absurde words that, though perhaps helpful, nonetheless feel needless in having to heave out a thesaurus to understand what they mean. Many may find some of the vignettes brash and offensive, and not just due to the characters presented in them, but also the way in which some members are portrayed, largely in sweeping, generalizing terms that seem to limit their humanity. In addition, some of the nomenclature of the book needs revision (such as replacing "schizophrenic" with "patient with schizophrenia"). For some readers, they will certainly find it repetitive in some places, while not elaborating issues in others. Likewise, it is largely a gatekeeper of a book and, as far as I can surmise, not readily enjoyable with the everyday citizen - though, perhaps it was never intended to be.
Irv's tome, The Theory and Practice of Group Psychotherapy is no less an extremely helpful and informative tool for the introduction and continued exploration into group therapy and continues, after all of these years and editions, to be the go-to for learning in this area of psychology. May Irv be enjoying the wealth - financial and otherwise - afforded from this book.