openbsd 4.5 ISBN missing from web site

Lars Nooden <[email protected]>
Newsgroups gmane.os.openbsd.www
Message-ID <[email protected]> 
I'd like to try ordering via a local book shop.  However,
the ISBN for OpenBSD 4.5 is missing from the web site:

	"You can also contact your favorite book seller and give
	them the current ISBN number, and ask them to special order for
	you."

	- http://www.at.openbsd.org/orders.html

What is the ISBN for the 4.5 CD set?

Regards,
-Lars
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