Greg Holden since he founded his business in 1993. His diverse list of clients includes both corporations and not-for-profits, and he has worked for universities for more than 20 years. His 40-plus books on such topics as marketing, creative services and security have sold more than 300,000 copies, and his book Starting an Online Business for Dummies is in its sixth edition. Holden's expertise, especially in the area of report writing, has helped companies and other organizations to continue to operate successfully long after their inception.