'Why do some ideas seemingly spread overnight, while others disappear? How can some products become ubiquitous, while others never gain traction? Jonah Berger knows the answers, and, with Contagious, now we do, too. ' Charles Duhigg, author of the bestselling The Power of Habit What makes things popular? And what is it that makes online content go viral? If you thought advertising, think again. People don't listen to advertisements, they listen to their peers. But why do people talk about certain products and ideas more than others? Why are some stories and rumours more infectious? Jonah Berger has spent the last decade answering these questions. He's studied why New York Times articles make the paper's own Most Emailed List, why some products get the buzz they do, and how social influence shapes everything from the cars we buy to the clothes we wear and the names we give our children. In this book, Berger reveals the secret science behind word-of-mouth and social communication. Contagious combines ground breaking research with powerful stories. If you've ever wondered why certain stories get shared, emails get forwarded or videos go viral, Contagious explains why, and shows how to make your product or idea catch on. 'If you are seeking a bigger impact, especially with a smaller budget, you need this book. Contagious will show you how to make your product spread like crazy. ' Chip Heath, co-author of Made to Stick