From the book reviews: "This is a comprehensive analysis of sleepiness in a 24-hour society from the perspective of a new WHO concept of Human Impact Assessment. ... The audience includes physicians, occupational health professionals, researchers, and policy makers. ... This is a timely contribution to the field of sleep medicine. It examines sleepiness from the perspective of Human Impact Assessment and will help guide therapeutic decisions for practitioners and formulation of social and public health policies by decision makers." (M. Isabel L. Crisostomo, Doody's Book Reviews, September, 2014)