I own the book myself. I learn a lot more from this book than the documentation, because it is based on good samples, especially the Radiosity part.
I also own the next version of this book for Shade 8 in japanese, and it's a really good one. Some parts are also the same, but other addition are really interesting. The only problem is that this book is all in japanese

Their is a lot of book in Japan related to Poser, see in attachement

Some books, even if they are not dedicated to Shade only, have a good parts which speak about it, like the Gundam book which is on the second photo.
I will post later for those you want, the Japanese CG book I own.