Jay Conrad Levinson released the first of more than sixty Guerrilla Marketing books in 1984, after a long corporate marketing career. A household name in the marketing world, he's sold more than twenty million books. For more information, go to www.gmarketing.com.

Shel Horowitz has been both an environmental activist/organizer and a marketer since 1972 (as a fifteen-year-old high school student). A world-renowned copywriter, marketing consultant, and award-winning author, he has participated actively in several major environmental and social change movements. This is his eighth book. For more information, go to www.shelhorowitz.com.