"The Theory and Practice of Group Psychotherapy" by Irvin D. Yalom and Molyn Leszcz is a comprehensive textbook on group psychotherapy. This updated sixth edition includes new sections on online group therapy, modern analytic and relational approaches, and group therapy tailored for a range of clinical populations. With a focus on both theory and practice, this book is suitable for mental health professionals looking to enhance their knowledge and expertise in conducting psychotherapy groups. The authors provide valuable insights and case examples, making it a valuable resource for practitioners and teachers alike.