DAO Object Model: The Definitive Reference
does not seem to be able to be purchased May I get a pdf of this book??
Unfortunately, that title is out of print, and is not available as an ebook. However, I do see some still available on Amazon:
Looks like there are some used starting at $0.88, and new starting at @ $12.00.
I hope this helps.
O'Reilly Media Customer Service Team