Turn your ideas into epidemics by helping your customers do the marketing for you. Seth Godin is an admans worst nightmare. He has made a career of exposing the limitations of traditional marketing methods while offering his own visionary solutions. He has also demonstrated the principles of the IdeaVirus firsthand: More than 250,000 copies of his e-book, Unleashing the IdeaVirus, have spread throughout the Web for free. Napster, Hotmail, GeoCities, and Volkswagen are just a few of the businesses that have successfully launched their products with an IdeaVirus by letting customers get to know and communicate with each other. This customer-to-customer dialogue spreads like a virus, costs companies next to nothing, and could signal the end to marketing as we know it. Now Godin shows how any business can unleash an IdeaVirus and profit from it.