The PK Man investigates the extraordinary claims of a man who allegedly possesses psychokinetic abilities. John E. Mack, a Harvard psychiatrist, delves into the life and alleged abilities of a man known as 'PK Man.' The book examines the evidence and testimonies surrounding his purported psychokinetic powers, exploring the psychological and scientific implications of such phenomena. Mack's work seeks to understand the nature of consciousness and reality through the lens of these unusual claims.

The book is regarded as a significant, albeit controversial, contribution to the study of parapsychology and consciousness. Mack's reputation as a psychiatrist lent a degree of academic credibility to his exploration of PK Man's alleged abilities. While some critics questioned the methodology and conclusions, others found the detailed case study compelling and thought-provoking. The work continues to be discussed within circles interested in anomalous phenomena and the boundaries of scientific understanding.