David Prakel 
Lighting [PDF ebook] 

Understanding light is fundamental to good photography. How any image is lit will change how the viewer sees and interprets the content. The second edition of Lighting teaches the theory and background of how light works, the different types of light and the rules it obeys. The book gives guidance on how to measure, control and use light for the best photographic exposure. With new images and case studies, this edition encourages a bolder and more innovative approach to the use of light in photography.