The book's intent is to share an idea with people interested in a renewable energy future. Much of the content is based on connecting existing ideas and progress towards a renewable energy based economy. The authors hope is to inspire other people, groups, and organizations to continue to move towards a hydrogen economy. The book touches on a variety of topics which includes wind, solar, biomass, and nuclear power. A historic perspective is highlighted throughout the book which plays an important factor, as does attitudes and trends that exist in the world today. In the opinion of Smith, this book is a great resource where people can start learning about topics in renewable energy.