“The audience is scientists or students interested in the role circadian clocks play in modulating the functions of physiological systems. … This is a high quality, comprehensive treatment of a very complex field of physiology. It is written in a logical, understandable manner that makes it easier to comprehend difficult topics. … Doctoral students in physiology will find their understanding of homeostasis and human survival enhanced by this book. It is an excellent contribution to the field of physiology.” (David R. Bell, Doody's Book Reviews, August, 2016)