Real-time 3D graphics and OpenGL are popular topics, and there are more information and techniques in practice than can ever be published in a single book. You might find the following resources helpful as you further your knowledge and experience.
The OpenGL SuperBible Web Site
http://www.starstonesoftware.com/OpenGL
The Official OpenGL Web Site
The Khronos Group OpenGL ES Home Page
http://www.khronos.org/opengles/index.html
The SGI OpenGL Extension Registry
http://oss.sgi.com/projects/ogl-sample/registry/
SGI's OpenGL Web Site
http://www.sgi.com/software/opengl/tech_info.html
ATI's Developers Home Page
http://www.ati.com/developer/index.html
NVidia's Developers Home Page
http://developer.nvidia.com/page/home
3Dlabs' Developers Home Page
http://www.3dlabs.com/support/developer/index.htm
Many Great OpenGL Tutorials (Game Heavy)
http://www.xmission.com/~nate/tutors.html
http://www.paulsprojects.net/opengl/projects1.html
http://www.gametutorials.com/Tutorials/OpenGL/OpenGL_Pg1.htm