Learn Linux 3-D Graphics Programming - Includes programming in C/C++ Matrix, perspective projection, polygonal modeling, blender, OpenGL/GLUT/MESA. I could not find anything about how to use KDE or Gnome, but then I guess games would not need this. There is a lot about Blender, I am not sure what is the current status on the Blender project?
Developing 3D Games Using Linux - I have not reviewed this book, so I would be interested to hear if it is useful? I would also be interested to hear if there are any other books that may be of interest to readers of this page.