From the front cover:
"This 16-page booklet features rules, guidelines, monsters and much more for playing ease. It can be used as a solitaire dungeon or can be made part of an exisitng campaign. A solo dungeoneer's delight!"
[Note: the book has 32 pages]
The Book of Mars: A Combat System, Demon's Run; Supplements: Catacombs of the Bear Cult: Level 1, Citybook I:
Very concise reviews of numerous "old AD&D modules" (cont'd p. 13)