From the web:
"Enter the Stronghold of Yrammag!
This is a the ancient stronghold of Yrammag with six tower levels and five dungeon levels. A 32-page booklet of a very tough D&D scenario. It is designed for very advanced characters, and includes encounters with everything from giant rats to a Minotaur and a demon. Tables have been provided for the random location and activity of the great Trammag, so that it will be a surprise each time the dungeon is entered by the adventurers. The surrounding wilderness is mapped out according to our Campaign Hexagon System, and Yrammag's spells are listed to provide a complete and detailed dungeon adventure, created and officially approved for use with D&D."