While this may be a great start for anyone just getting into the TV series or a young fan, it's really not as in-depth as I was hoping. Of course, it's not geared towards my age range, so that may have something to do with it. The pictures are very nice, and it did help jog my memory about certain characters/creatures that I had forgotten about (probably because they got so little screentime in the first place), so I will give it that. But my biggest complaint is that I think it was published too early. There's no mention of characters from season three onward; season three premiered in fall of 2010, the same year this book was released, so that explains that. If they had waited at least one more season before publishing this it would have been slightly better.
All in all, it's a decent little guide, but definitely not what I was hoping for in terms of an "encyclopedia".