Power of When: Discover Your Chronotype--and the Best Time to Eat Lunch, Ask for a Raise, Have Sex, Write a Novel, Take Your Meds, and More.

Michael J. Breus, PhD, is a Clinical Psychologist and both a Diplomate of the American Board of Sleep Medicine and a Fellow of The American Academy of Sleep Medicine. Dr. Breus has been featured on The Dr. Oz Show more than 30 times and writes regularly for The Huffington Post, The Dr. Oz Blog, and Psychology Today. He is the author of The Sleep Doctor's Diet Plan and Beauty Sleep.