While the 9th edition covers OpenGL 4.4 (lacking DSA), it is often legally available for download via university library archives. The transition from 4.4 to 4.5 is evolutionary, not revolutionary. Use the 9th edition to learn Shaders and Buffers, then read the DSA spec online.
The 10th edition of the OpenGL Programming Guide has been updated to cover the latest features of OpenGL, including: opengl programming guide 10th edition pdf exclusive
Now, let's address the keyword:
