One of the diamonds in the rough of the 2E days. Lots of cool new spells, magic items, critters, etc. As well as details on the Greater and Lesser Boneheart, the Boneshadow, armies of Iuz, etc. A steal at only $4.
Well worth the time to convert to 3.5. Features fantastic locations: Point Harrow, Demonwing and Citadel Coldsteel, great NPCs: Emirikol the Chaotic, 2 of the coolest - if now 'dissed' Arch-devils of all time and a working reason to fight both demons and devils in the same adventure. Dungeon had a top 30 of all time column a while back - how this gem didnt make the top 5 - let alone the top 30 - I dont know