"Programming the OS/2 Presentation Manager"
by Charles Petzold
"Programmer's Guide to Presentation Manager"
by Allan Southerton
"OS/2 Presentation Manager GPI"
by Graham C. E. Winn
"The Art of OS/2 Warp Programming"
by Kathleen Panov, Larry Salomon Jr., and Arthur Panov
"OS/2 2.1 Workplace Shell Programming"
by Stefano Maruzzi
"Learning to Program OS/2 2.0 Presentation Manager by Examples"
by Knight