Contagious is a best-selling book about the concept of online word-of-mouth, or viral marketing. It is full of stories and examples. Indeed, it is packed with such things, making it a rather entertaining read. The author is a professor of marketing, so as you might expect, it goes into detail about the “why” of viral marketing. The book has plenty of evidence of what works. Thankfully, this means that the book is wonderfully stimulating and should provide you with several ideas as to how you can tap into online word-of-mouth marketing. What the book is short on, however, is practical “how to” kind of material. That doesn’t mean this book is not useful, it just means that if you want a practical, step-by-step manual, this is not the right book for you. However, if you want a stimulating and entertaining read that will get you thinking about viral marketing and how you can apply it in your business, then this is just what you need.