Here's an exceptionally interesting book that I don't have yet. Otacool - Worldwide Otaku Rooms came about when Danny Choo asked his readers (otakus primarily) to submit photos of their rooms. A lot of them did. And a lot of them have really cool rooms. They are more like shrines to me, except with a bed.
The book's 128 pages filled to the brim with great photography. It's a fascinating look into the world of, either professional or fanatic, collectors. You can check out more pictures of the book at dannychoo.com.
It looks like it's published with both English and Japanese text, although the preview pictures I grabbed off Amazon shows only Japanese.