“In this remarkable new book, Kristen Butler does more than just rewrite the popular myth that the ‘comfort zone’ is a stagnant place to be. She also shows us how and why the very opposite can be true—why, when we’re in a state of dis-comfort, our bodies don’t function at their peak, and we cannot therefore perform optimally to learn, create, and grow. The Comfort Zone is a must-read for anyone who wants to truly thrive.”