The World's Largest Dungeon
World's Largest Dungeon, The
The World’s Largest Dungeon is a single book campaign setting from Alderac Entertainment Group (AEG). It is written for use with the D20 System from Wizards of the Coast (WoTC). It totals 840 pages, and contains at least one of every type of monster (an example they give to explain how this is possible is having one metallic dragon or chromatic dragon checks all dragons off the list).
The AEG website can be found here: http://www.alderac.com/.
The WoTC wbesite can be found here: http://www.wizards.com/.