The second module ever written for Dungeons & Dragons was a 1976 game convention tournament adventure written by Gary Gygax: The Lost Caverns of Tsojconth. What was the first D&D module? Palace of the Vampire Queen! The original Tsojconth was a very simple affair with loose typewritten sheets inside a folio cover, all contained in … Continue reading D&D Ultra-rare: Lost Caverns of Tsojconth (1976) – The Original Edition of AD&D Module S4