Dan Margulis is internationally regarded as the leading authority on color correction. He is the author of Professional Photoshop, which, since its first edition in 1994, has become the unofficial bible of the prepress and printing industries. His column, "Makeready," which focuses on practical production issues, appears in both Photoshop User and Electronic Publishing magazines. Formerly a professional prepress manager with over 20 years experience heading electronics departments at high-end trade shops, he now offers small-group, hands-on color correction classes in the U.S., Canada, and Europe in four different languages. In September 2001, Dan was one of the first three persons named to the Photoshop Hall of Fame of the National Association of Photoshop Professionals.