This is a solid, well laid out book with some very in depth maths. Thankfully, the math is covered in the first few chapters and throughout (always good for a refresher).
A few people may object to the coding style and pretty hardcore C++. But, it is consistent through-out and very readable once you get used to it.
The jump from fixed pipeline 3.x to the new 4.x shader based engine is most welcome. The examples provided are extensive and easy to understand. Good support and updates are provided from www.geometrictools.com.
All in all, a fine purchase and a really good improvement on the first edition.
Also, it has to be said that it`s a pretty damn good price for a shader based "next gen" capable engine.
Enjoy.