The human aura is not a new subject. It has been existing in the human history since ancient times. In this book, the author writes about the aura in a scientific and an interesting way which is suitable for both laymen and researchers in this field of study. This book is based on the knowledge of modern medicine in order to explain many ambiguous issues concerning the human aura. The reader can find answers for many questions about this subject. This book explains, for example, the reciprocal relationship between the healthy aura and the healthy human body. It also explains the true relationship between both the nervous and the endocrine systems and the human aura.