This book is pretty pointless. What is consists of is page after page of character bios from the comic book series, and also lists their status, such as dead, alive, or zombified. Not only can you get this information for free at the Walking Dead Comic Wiki, but at this point a lot of the information is out dated. This book is ment to compliment issues one through eighty-four, but at the time of this writing, the series is on issue 100, which makes a lot of the information contained in this book obsolete, and as a result, inaccurate.
This is the kind of book that should be written after a series concludes, not at the hight of its popularity. It would be a great refresher guide, and a good piece of source material, but again, only if it remains relevant to the characters being referenced, which it doesn't. I speculate there will be an updated version of the survival guide at some point, but again, if the series hasn't concluded, it too will become obsolete.
Furthermore, if you've read the comics, there really isn't any reason to buy this book because you already know what happened to the characters. On the other hand, there is no reason to read this book if you're not going to read the comics. So, like I said in my very first sentence, this book is pretty pointless.