This Full Color module is for 1st Edition AD&D and requires six to eight well-geared characters of levels 5 thru 7.
Again, the module is printed in Full Color and includes the Upper Works plus three dungeon levels, one new monster and many new magic items.
Tactics will be paramount; loud careless parties are sure to be surrounded, surprised and dispatched with ease. The denizens either cooperate or use each other symbiotically. They will attack from positions of strength and use familiarity to fall back, flank, and out-maneuver the party.
If your players are used to throwing open doors and stabbing things until they die, consider further tactical training prior to unleashing this adventure on them.