Erwin Yalom's book Group Therapy: Theory and Practice, in collaboration with Molin Lesch, was named one of the ten most influential books in the field of psychotherapy. The book encompasses the main ideas and practical methods of group counseling and describes in detail, professionally and fluently the latest developments in the field of group therapy. The book includes key topics, including: the therapeutic factors and their combination: the work of the therapist and his training: individual therapy in parallel with group therapy: the establishment of the therapeutic group, composition and nature: therapeutic techniques, self-help groups and online support groups: adaptation of traditional group therapy to special clinical situations, and more. The book is written clearly and eloquently and combines vivid case descriptions, rich clinical experience and recent research findings. Researchers, psychologists, interns and group therapists will find in it comprehensive and valuable information presented in a fascinating way, as is the way of Erwin Yalom in all his books.