The introductions to all these social networking sites were extremely basic. Since this books is meant to be more than an introduction to social media, I was rather disappointed. How to engage social media for the purposes of marketing wasn't even the main focus of the book. It came across more as an afterthought. Doesn't help that this book is almost 5 years old.
Those who engage in social media even for private purposes will hardly learn anything new through this book. Engaging with social media will teach a lot more about the ins and outs of it than this book does. Due to the limited marketing spin involved, there's little extra value as well.
Personally, I think this book is only useful for those who don't engage with social media at all. Even then, it's probably more helpful to look for a book that has been published more recently. After all, most tech books are already outdated the moment they hit the shelves.