Jay Conrad Levinson is the author of the best-selling marketing series in history, "Guerrilla Marketing", plus 27 other business books. His guerrilla concepts have influenced marketing so much that today his books appear in 41 languages and are required reading in many MBA programs worldwide. Jay taught guerrilla marketing for ten years at the extension division of the University of California in Berkeley. And he was a practitioner of it in the United States -- as Senior Vice-President at J. Walter Thompson, and in Europe, as Creative Director and Board Member at Leo Burnett Advertising.He has written a monthly column for Entrepreneur Magazine, articles for Inc. Magazine, and writes online columns published monthly on the Microsoft Website -- in addition to occasional columns in the San Francisco Examiner. He also writes online columns regularly for Onvia.com, FreeAgent.com and MarketMakers.com, and InfoUsa.com in addition to occasional columns for Guru.com.Jay is the Chairman of Guerrilla Marketing International, a marketing partner of Adobe and Apple. He has served on the Microsoft Small Business Council and the 3Com Small Business Advisory Board. His Guerrilla Marketing is series of books, audiotapes, videotapes, an award-winning CD-ROM, a newsletter, a consulting organization, an Internet website, and a way for you to spend less, get more, and achieve substantial profits.