It was that and MUCH more. An in-depth investigation into network theory running the gamut of subjects from physics to cell biology to terrorism to the Internet.
A fascinating read that, if you really think about it, helps you uncover some of the hidden elements of our day to day interactions with each other and how we may be affected (or able to impact) by persons "six degrees" away.
For marketers, this gives you more ideas on how to change the way you identify and communicate with your best and most influential customers. The same is true for politicians, would-be revolutionaries, or any one who wants to get the message out.