What if "Do as I say, not as I do" was a D&D module? In 1979 Gary Gygax wrote The Keep on the Borderlands, cribbing plenty of useful GM advice from TSR colleague Mike Carr. Prepare yourself, friends, to experience the full power of mine imagination, for I am the Dungeon Master. I speak eternities into existence, only truths fall from my lips. Oh and there's a big fort on a hill. Don't be mean to the guards!