User summary: The Inzeladun Campaign Source Book contains extensive notes on nearly all aspects of the Inzeladun Campaign and setting. Most of the content is updated to D20 but the author notes the materials have been developed since 1981 and some items have remained essentially unchanged since that time. The book is divided into topical chapters and includes information on: Races Classes Prestige Classes Skills and Feats Equipment Spells Magic Items Monsters Kingdoms of Inzeladun (with maps) Organizations Additional materials include tips on running a campaign in the Inzeladun setting, recommended reading, notes on campaign design, and so forth.