“Programming Vertex, Geometry, and Pixel Shaders” by Wolfgang Engel, Jack Hoxley, Ralf Kornmann, Niko Suni and Jason Zink is a book published for free to the GameDev.net wiki and covers a wide range of shader programming techniques. It is covers mostly DX10 techniques and seems to be D3D-centric, but I’m sure there is plenty of [...]