Gregg D. Jacobs, PhD, is a behavioral sleep medicine specialist with over thirty years of experience in the field. As a senior scientist at Harvard's Mind/Body Medical Institute and an assistant professor of psychiatry at Harvard Medical School, he spent almost twenty years treating and researching insomnia.
Timothy Andres Pabon is an actor and Spanish and English voice-over artist/audiobook narrator from Washington DC. He has recorded over 140 books, one of which was nominated for a 2015 Society of Voice Arts and Sciences Award and another which received an AudioFile Earphones Award as part of an ensemble cast in 2014.