Jay Conrad Levinson is the author or coauthor of the more than 32 books in the biggest series of books on marketing in history. His books appear in 60 languages and are required reading in many MBA programs worldwide. Jay taught guerrilla marketing for 10 years at the extension division of the University of California in Berkeley. He was a practitioner of guerrilla marketing in the United States-as senior vice-president at J. Walter Thompson, and in Europe, as creative director at Leo Burnett Advertising. He has written monthly columns for Entrepreneur and Inc., a syndicated column for newspapers and magazines and online columns published monthly on the Microsoft and GTE web sites.