Bottom line up front: If you are a programmer or are primarily interested in Linux, you can probably change the rating to "4 stars", simply because this book is oriented towards the Microsoft set, and is primarily focused on the features of IPv6 and networking, with no code samples.
Even so, if you are looking for a volume that covers all of the major aspects of IPv6 down to the packet level, this is a good place to start. CD-ROM includes PowerPoint slides and an "e-book" (in .chm format, sorry anti-Microsoft folks).
Basic breakdown of each chapter is to introduce a topic in generalities, and delve into specifics, offering syntax examples of commands, etc. in Windows format where appropriate.
Overall, this is a solid book. Given the shortage of "overview" style IPv6 books as of this writing, this book is a necessity (Microsofty or not) for your bookshelf if you will be implementing IPv6 any any form in the foreseeable future.