Genshiken Official Book

This was a decent read, but I'm really not sure who it's meant for. Most of the material in this book is material that is compiled from the manga, which means that if you're a fan of the manga and you've already read it (and own the volumes), then you've already read everything in here. If you're not a fan of the manga or haven't read the manga yet, you'll either be lost, or have the manga spoiled for you. Honestly, I really don't see much of a reason to check this out.

That said, I did enjoy the book, and little bits of new material we get (including interviews with Kio Shimoku and Ken Akamatsu about anime fandom) are really enjoyable. However, I can't really recommend buying this unless you're a Genshiken completionist.