First off, thanks for moderating the DirectX forum, always appreciate the responses. I'll certainly be buying your book when it's published!
A few questions about the book:
What PS spec are you writing it to, 3.0? 4.0?
Are you going to cover Geometry Shaders at all?
Are you going to cover any of the relief mapping optimizations, like Cone-Step mapping?
And one last comment:
Your last self-shadowing relief mapping looks a little strange. While I believe the ray-tracing looks like it is calculating the shadows correctly, it seems like it's replacing the shadowed pixels with a flat gray color. Of course, I'm on a laptop in a bright room, so I may just not have the contrast to see the shadowed/shaded pixels correctly.
Either way, keep up the good work!