Depths of Madness: The Dungeons
by Erik Scott de Bie
Wizards of the Coast Mass Market ISBN/ITEM#: 9780786943142
Date: 13 March 2007 List Price $6.99 Amazon US / Amazon UK /
From back of book: Now it's her turn. Eldritch and forgotten arcana wait within its vaults. Twisted accidents of magic prowl its halls. Sinister forces lure the unsuspecting deeper into death or madness. Its victims don't remember how they got there. No one remembers how to get out.
(Source: Wizards of the Coast)