They Knew the Unknown explores the connections prominent figures, such as scientists, writers, and even politicians, had with psychic phenomena, spiritualism, and the paranormal.

Ebon presents case studies of individuals like Thomas Edison, Sigmund Freud, and Carl Jung, detailing their documented experiences and interests in areas like spirit communication and other forms of anomalous phenomena, presenting them as a means of "knowing" the unknown beyond conventional understanding.

Good condition, the book pictured in this listing is the book you will receive.