"Explore the mega-dungeon of Undermountain in this adventure for the world's greatest roleplaying game"--Cover

"Hundreds of years ago, long before Waterdeep had been built, Halaster Blackcloak carved a vast dungeon beneath Mount Waterdeep and stocked it with all manner of creatures from across the planes. Over time Halaster has gone quite insane and the dungeon he carved, now dubbed Undermountain, is a labyrinthine death trap for those bold enough to venture within. Precious few have returned from Halaster's home, and frequently they're not who they were when they started out. One thing is certain however. Wealth unimaginable exists within the halls of Undermountain"--Provided by publisher

"For use with the fifth edition Player's handbook, Monster Manual, and Dungeon Master's Guide"--Back cover

A Dungeons & Dragons adventure for characters of levels 1-5

Dungeon key -- Undermountain overview -- Dungeon level -- Arcane chambers -- Sargauth level -- Twisted caverns -- Wyllowwood -- Lost level -- Maddgoth's castle -- Slitherswamp -- Dweomercore -- Muiral's gauntlet -- Troglodyte warrens -- Maze level -- Trobriand's graveyard -- Arcturiadoom -- Obstacle course -- Crystal labyrinth -- Seadeeps -- Vanrakdoom -- Caverns of ooze -- Runstone caverns -- Terminus level -- Shadowdusk hold -- Mad wizard's lair -- Skullport