Kidlington, United Kingdom [RenewableEnergyAccess.com] Maps can offer more information than where two streets intersect. Authors Woodrow W. Clark II and Ted K. Bradshaw have designed a “road map” that could help countries across the world learn how to diversify their power sources if the energy economy moves beyond fossil fuels.“Agile Energy Systems, Global Lessons from the California Energy Crisis”, is the latest book in the Global Energy Policy and Economics series published by United Kingdom based Elsevier. Clark is a senior fellow at the Milken Institute and Bradshaw is a professor at the Davis campus of the University of California. The key to the fuel source paradigm, according to the book, is to develop the use of renewable energy resources such as wind, solar and water, and combine these technologies to include the use of hydrogen. “This book is a promissory note for a global clean energy future,” said Jeremy Rifkin, who is the founder and president of the Foundation on Economic Trends. “It defines what the practical world of energy is today and can be in the future.” The authors cite the 2000-01 electricity crisis in California as the prime example of an energy supply system gone wrong. They provide reasons as to why the current deregulated system isn’t working, and why an agile energy system based on renewable energy generation and hybrid or combined technologies should offer a supply of constant and efficient energy while reducing dependence on fossil fuels. “Agile Energy Systems” is divided into three sections. Part one describes the five precipitating factors that led to the deregulation debacle in California; part two examines how civic markets, new economic models and planning for complexity as sustainable economic development can create an agile energy system within California; and part three examines the emerging hydrogen technology and its importance to the future of energy systems.