"Each book in this series follows a packet of energy along a journey. Each stage of the journey is described in a short chapter, and we learn what alternative paths the energy might have taken along the way. This book shows how sunlight is turned into a movie. It explains what happens when the sunlight reaches Earth, how its energy is stored in fossil fuels, how this energy is then released in power stations and used to generate electricity which is used to make light, and finally how this light is used to make a movie. The topics covered are illustrated with experiments, amazing facts and scientific discoveries."-- Provided by publisher.

What is energy? -- What is the most important energy source on earth? -- Why is sunlight from the past still important today? -- How do power stations produce electricity? -- How do we turn light into electricity and then back to light again? -- What have we learned about light and energy?.