In the Age of Worms Overload, Erik said that the City of Greyhawk Boxed Set and Greyhawk: The Adventure Begins would be good sources of information for use in the campaign. He also said that they are available as PDFs. I've found Greyhawk: The Adventure Begins on RPGnow.com, but I can't find the City of Greyhawk Boxed Set.
Can anyone provide me with a link where I can buy the City of Greyhawk PDF?
And on the subject of Other Supplements, what would be suggested as good material? There are lots of PDFs on RPGnow.com, including Return of the Eight (which features Tenser's Citadel), the Rod of Seven Parts Boxed Set (which details the Rod and has other information about the Wind Dukes and the war), and other Greyhawk specific material.
Thanks in advance.