Godin’s Unleashing the Ideavirus entertains the reader while successfully setting off bursts of ideas along the way. Rather than marketing at the consumer, Godin’s approach seeks to maximize the spread of information from customer to customer. The book provides the expected examples of successful ideavirus marketing, then develops a recipe for concocting your own ideaviruses. In order to show how to make your idea infectious, the book examines what makes a powerful ‘sneezer,’ how ‘hives’ work, and applies the concepts of critical velocity, vector, medium, smoothness, persistence, and amplifiers. As Godin shows, the now-familiar idea of viral marketing is one very specific form of ideavirus marketing. Most businesses will not be able to engage in true viral marketing, but all can use the ideavirus approach.