The promotion trough "word-of-mouth" remains one of the most effective and most common methods and, in case of casinos, "word-of-mouth" is most of the times decisive. I recommend this book because it reveals how we can benefit from this method and maximize its results. In addition, the books presents an analysis of those subjects that became viral – sometimes without too much effort - versus the ones that can't be promoted despite our efforts to communicating them.