From the back of the book:
Located near the coast of hex 2214 of the Isle of the Unknown, this dungeon enshrines the mysteries of the Isle’s lost Minoan past. The module includes scaling information that allows it to be immediately and effortlessly used to challenge characters from 1st through 10th level. It features:
2 Dungeon Levels
2 Wandering Monster Tables
6 Sample Goop Monsters and a Random Generator to Make Countless More
12 Weird Locations
19 New Monsters
7 Human Encounters
Along with the dungeon maps printed on the inside of the detached cover are keys that give an evocative appellation for each of the maps’ 75 encounter areas. The Referee can place the above 50 treasures, weird locations, new monsters, and human encounters in the blank spaces provided as he sees fit. Or, if he would rather, he can use the optional placements already given in the keys.
In any and all cases, the pontifical Referee is encouraged to add to, subtract from, and otherwise alter all within to suit his sovereign whims.