2006 · ソースブック（プレイを拡張するルール／オプション）

E.N. Guild Vol. 6: Thieves' Guild

A sourcebook for roleplaying organized thieves’ guilds, presenting them as structured criminal establishments rather than informal bands of pickpockets. It details guild terminology, the thieves’ code, internal ranks, and a blacksmith shop used as a guild safe house. The book adds two new uses for the Bluff and Perform skills, four feats, new prestige classes, three spells, and three magical items for campaigns involving burglary, protection rackets, and underworld intrigue.