A Catalogue of the Land of Flanaess

The Catalogue or Guide is largely an expanded and revised version of the 1980 Folio, increased from 32 to 80 pages.

The calendar has been expanded from 360 to 364 days by extending each of the four festivals from six to seven days, allowing the days of the week to fall on the same numeric days each year. New information is given on trees of the Flanaess. The major human ethnic groups are described in terms of skin, hair, and eye color and traditional colors and styles of dress. Uncommon languages are described.

The list of runes and glyphs is reduced from four pages to one, and the runes themselves have changed. Various small changes are made to the list of realms, with the notable addition of names of rulers. As with the original Folio, the list of geographic locations appears.

A notable addition is Deities of the World of Greyhawk, introducing numerous gods of the Flanaess. The deities listed are the greater gods Beory, Boccob, Incabulos, Istus, Kord, Lendor, Nerull, Pelor, Procan, Rao, Tharizdun, Ulaa, Wee Jas, and Zilchus; Cyndor (listed as both greater or lesser the lesser deities Allitur, Atroa, Beltar, Berei, Bleredd, Bralm, Celestian, Delleb, Ehlonna, Erythnul, Fharlanghn, Fortubo, Geshtai, Heironeous, Hextor, Joramy, Kurell, Lirr, Llerg, Lydia, Myhriss, Norebo, Obad-hai, Olidammara, Phaulkon, Pholtus, Pyremius, Ralishaz, Raxivort, St. Cuthbert, Sotillion, Syrul, Telchur, Trithereon, Velnius, Wenta, Xan Yae, Xerbo, and Zodal; and the demi-gods Iuz, Rudd, Wastri, Zagyg and Zuoken. Of these 59 deities, 22 are described in more detail.