During my years in the economics profession, many of my most rewarding moments have come from my role as a textbook author. I don’t know the exact number, but I would guess that, including translations, about four million copies of my books are in print. It is common for me to meet random people— such as a host in a restaurant—who, after hearing my unusual last name, ask me if I am the author of their textbook. And many young economists have told me that reading my principles text got them interested in the field (much as the Lipsey and Steiner book did for me many years ago).