Thank you to my wife and children for encouraging me and filling my life with love. I am also grateful to the brilliant and supportive team at Prometheus Books, especially Steven L. Mitchell, Jade Zora Scibilia, Meghan Quinn, Jill Maxick, Catherine Roberts-Abel, Nicole Sommer-Lecht, Bruce Carle, and Brian McMahon. And thank you to Kevin Hand for the artwork that appears at the start of each chapter in this book. He is one of the world’s best illustrators and working with him is always a joy.