The book is written for Python 1.5, but win32 hasn't changed much and neither has the core Python syntax, so it's still very much applicable. (The one major difference is that the book had to concern ifself with converting Unicode strings everywhere, whereas in Python 3 with current pywin32 it just works.)
[1] https://www.amazon.com/Python-Programming-Win32-Windows-Prog...
[1] https://github.com/mhammond/pywin32/
[2] https://www.amazon.com/Python-Programming-Win32-Windows-Prog...