From the back cover (of 1st to 3rd printings): Deities & Demigods Cyclopedia Provides the Dungeon Master with Gods, Heroes and Monsters from Myth, Fiction and Legend for use in rounding out an Advanced D&D campaign. Within this book are seventeen pantheons of divinities, each profusely illustrated. Also included are new material on Clerics' conduct and their relationship with their Deities, information on Character mortality and immortality and more!