Excellent book. My first of this year -and I hope, of many more to come.-
I have considered myself an otaku-wannabe for a while, but after reading this book, I realized that it was a huge joke. Otakus are seriously into it. It is not a mere hobby. I am more of a manga-wota; Johnny-wota.
This encyclopedia is very complete, it covers from manga to anime; video-games to idoru. There are great pictures: about idorus, places, dolls and figures, but also some of them are very sexual. It also includes interviews with some connoisseurs of different fields (maid, anime, cosplay, etc.), some crimes that occurred with an otaku as the perpetrator.
It is like this opened my eyes. I have always found Japan a fascinating culture, but several times I was thinking this is so crazy (the dolls... the different kind of maids... certain fetishes. WOW).
I loved this book. PG-18