The fourth edition of this highly readable book examines all of the essential skills required to be an effective leader of a variety of groups in a variety of settings. It explores the history of group therapy work, and the development of groups how they grow, how they change, and how various groups differ. It addresses the specifics of working with children, adolescents, adults, and the elderly. And, it discusses ten prominent theoretical perspectives from which groups can be approached, covering how each theory evolved, how it is practiced, and the results it most commonly achieves. Includes coverage of working with gay/lesbian/bisexual clients in groups and includes expanded coverage of the multicultural aspects of group work and understanding the influence of culture, ethnicity, religion, sexual orientation and other factors on how groups function and what they can accomplish. For professionals in the field of group counseling.