This is an excellent book on OpenGL. This may not be for the absolute beginner in computer graphics (it does assume you understand some concepts of computer generated graphics) but for those that understand the fundamentals of graphics, this is a superb book. Commands are organized nicely into numbers of tables for eacy access along with extensive indexes for reference. Not only does it explain the commands that OpenGL uses, it goes into what happens behind the scenes (what OpenGL does "for you") when you invoke a command. This can make determining if an effect is too taxing on your processor to bother with. For someone that knows a little something about computer graphics (you don't really have to know much) and is learning OpenGL, this is an essential piece of equipment.