The intervention of the other side of life is here, simply on another level. A belief system is not necessary, since we share the same space. Through witness testimonials, documented cases and supporting scientific facts, Dr. Holzer views "passing" in a different way. The original Ghost Hunter Professor, Dr. Hans Holzer has authored over 100 titles that bring the natural law of spirit connection to the forefront of science and the paranormal today. AUTHOR: Hans Holzer, the original Ghost Hunter Professor, has authored over 100 titles that bring the natural law of spirit connection to the forefront of science and paranormal activity.