Don Lancaster is the head of Synergetics, a prototyping and consulting firm that specializes in electronic design and micro applications. Lancaster has written many books about personal computers and electronics. Among the best known are the CMOS Cookbook and the TTL Cookbook, but he is also the author of The Hexadecimal Chronicles, The Active Filter Cookbook, The Cheap Video Cookbook, The Incredible Secret Money Machine, and several books about Apple computers. Lancaster's books are popular because he writes about technical subjects in a clear, understandable way. He has also written more than 200 articles, some of which have been collected in the book The Case Against Patents: Selected Reprints from Midnight Engineering and Nuts & Volts Magazines. When not working with computers and electronics, Lancaster's interests include firefighting, bicycling, cave exploration, and ecology.