From the introduction: Perhaps no organization of wizards is as recognized by DUNGEONS & DRAGONS players as GREYHAWK’S Circle of Eight. Some Circle members were active in Gary Gygax and Rob Kuntz’s original Greyhawk Campaign, and are as old as the game itself. Many of the spells and items in the Player’s Handbook and Dungeon Master’s Guide bear their historic names. The contributions of the Circle of Eight are woven into the fabric of D&D campaigns everywhere. User summary: This item was available as a free download (a "web enhancement") from the publisher site.