From publisher blurb:
Stonehell Dungeon is a classic-style megadungeon, filled with enough monsters, traps, weirdness, and treasure to keep you gaming for a long, long time. Explore over 700 rooms, encounter more than 40 new monsters, and discover 18 mysterious magical items -- and that's just in the first book! Stonehell Dungeon: Down Night-Haunted Halls details the first six levels of a megadungeon intended for use with the Labyrinth Lord™ role-playing game, but is easily adaptable to most early versions of the original fantasy role-playing game and its retro-clones. Featuring art by J.A. D'Andrea, Lee Barber, Marcelo Paschoalin, and Ralph Pasucci, Stonehell Dungeon gives the game master all the necessary information to run his players through the dungeon, while offering enormous opportunities to customize and expand on the site. Suitable for characters of levels 1 through 7.