I'm currently reading "Shaders for Game Programmers and Artists" and must say that it's very good! Download the preview if you're not sure.

http://www.courseptr.com/ptr_detail.cfm?...59200%2D092%2D4

A6.31.4 Commercial AMD Athlon XP 2400+ Radeon 9800Pro 512MB DDR-Ram Windows XP Professional SP2 3D GameStudio Magazin