Intriguing book! It explores what is known about how biological clocks are embedded in every aspect of human biology, guiding us toward the best times to sleep, eat, take medications, to think, and to work. Award-winning scientist, Russell Foster, explains how and why night-shift work, caring for a newborn, and too busy calendars take their tolls on mental and physical health. Excellent resource for counselors, clinicians, and business managers.