In this book, Peta Trigger traces the history of electricity generation and transmission from the ancient greeks to modern times, focusing on landmark generating and storage devices in the evolution of electricity generation. She describes the building and performance of replicas she made of some of these machines, and compares them with their modern counter- parts. Her other recent book, 'Wind Turbines: Description, Appraisal & Alternatives' however, is principally concerned with the present day and the future generation and transmission system in the UK, and the role of wind turbines in it.