Graduated from Michigan State University with two Ph.D degrees, Dr. Hasan Yahya, trained in sociology, psychology, and education. In his career, he was involved in human Behavioral changes, socially and psychologically. Dr. Yahya published 16+ books so far, in various areas. His recent book was: Personality and Stress Management. He resides in Michigan, USA. Publications may be found at his webpage: http: //www.hasanyahya.com