The Howling Tower
Cover of The Howling Tower
|Designer(s)||David A. Hargrave|
The Howling Tower (also known as Arduin Dungeon Number Two) was a standalone short story and gaming module written in 1979 by David A. Hargrave and published by Grimoire Games. It was based upon Hargrave's gaming system known as Arduin. It is the second of only four standalone "dungeon" books created by Hargrave as an extension of his Arduin Multiverse, which at the time of The Howling Tower's publication was known as The Arduin Trilogy.
At 32 pages, The Howling Tower contains maps, descriptions, a short story, and overviews, with detailed room descriptions and trap matrices, two ground level dungeons and six tower levels with eight pocket sized magic artifact cards and eight illustrated monster cards with statistics. 
Cover illustrations are by Greg Espinoza, back cover and interior illustrations are by Erol Otus.
While designed for use with the Arduin gaming system, The Howling Tower is usable with any d20 or other RPG system. The module was recommended for characters level 1 thru 4 (in the Arduin universe).
The Howling Tower was originally published by Grimoire Games and went out of print in 1984. In 2002 reprints of The Howling Tower were made available from Emperor's Choice Games and Miniatures, but were discontinued in August 2006. Since then, the company folded The Howling Tower and all other Arduin dungeon modules into a single publication called "Vaults of the Weaver". 
- Caliban: Arduin Dungeon Number One
- The Citadel of Thunder: Arduin Dungeon Number Three
- Death Heart: Arduin Dungeon Number Four