The Arduin Trilogy is a collection of three supplements for original Dungeons & Dragons, self-published David A. Hargrave, set in his Arduin multiverse. The three supplements were The Arduin Grimoire (1977), Welcome to Skull Tower (1978), and The Runes Of Doom (1978). These books are the most famous creations of Hargrave in the Arduin setting, before it was acquired by Grimoire Games and published as a stand-alone game (separate from D&D), called Arduin.
- David Hartlage (2020-03-03). "The Arduin Grimoire: The “Coolest RPG Book Ever,” also the Book Gygax Mocked As Costing Readers 1 Int and 2 Wis". DM David. Retrieved 2020-03-03.