Book excerpt: Following up on the great success of The Moment It Clicks and The Hot Shoe Diaries: Big Light from Small Flashes, legendary magazine photographer Joe McNally takes us on another memorable ride with Sketching Light, another trip into the land of light--but this time running the gamut from small flash to big flash, and everywhere in between. Of course, Joe includes coverage of Nikon Speedlights, but he also covers big flash, as well as "in-between" lights as the Elinchrom Quadra. The exploration of new technology, as well as the explanation of older technology. No matter what equipment Joe uses and discusses, the most important element of Joe's instruction is that it is straightforward, complete, and honest. No secrets are held back, and the principles he talks about apply generally to the shaping and quality of light, not just to an individual model or brand of flash. He tells readers what works and what doesn't via his let's-see-what-happens approach, he shows how he sets up his shots with plentiful sketches and behind-the-scenes production shots, and he does it all with the intelligence, clarity, and wisdom that can only come from shooting in the field for 30 years for the likes of National Geographic, Time, Life, and Sports Illustrated--not to mention the wit and humor of a clearly warped (if gifted) mind.