This book investigates the psychological mechanisms and social impact of the Erhard Seminars Training (est) movement. Sheridan Fenwick, a clinical psychologist who completed the training herself, utilizes her professional background to analyze the program's methodology. She examines the structure of the seminars, the psychological techniques employed by facilitators, and the resulting behavioral changes observed in participants. The text provides a critical evaluation of why the movement gained significant popularity despite its controversial reputation.

Experts and readers often cite this work as a primary source for understanding the internal mechanics of 1970s human potential movements. The text is frequently noted for its balanced approach, blending personal experience with professional psychological observation.