To say this book is about the power of one person to change the world, though true, would be a cliché. This book is not about David, sustainability, or even green buildings. It is about the mystery of change. Although it is axiomatic that everything changes, it is a mystery as to how things change. What we have here is a first-person and animated account of how things did change. When you read it, you will draw your own conclusions. Yes, his is a story of pluck and determination, to be sure. And it is one of timing, hard work, and manufactured luck. But above all, it is a story of conviction. Not the conviction that makes others wrong, but more an affirmation: of what is right and what is possible.