Marc Campbell is a technology author, graphic designer, and instructor. His popular guides to computer graphics have appeared around the world in four languages. When he isn?t trying to beat a deadline, you can find him out and about in Center City Philadelphia or at home with the lights down and the phone ringer off, his nose in a story about Robin Hood. This is his eleventh book. Dave Long of Canberra, Australia, has been a photographer for several years. He went digital in 2004 and now works exclusively in the digital domain. His favorite subjects are the environment and animals, but he enjoys photographing almost anything. Rarely seen without a camera, he believes it?s important to capture and reflect on moments and situations.