Call of Cthulhu
7th Ed Keeper Rulebook
The Temple of Yellow Skulls
Don Bassingthwaite
D&D: Abyssal Plague (2)
Ostara: Customs, Spells & Rituals for the Rites of Spring
Edain McCoy
XP1 Conversion Booklet [v1]
Unknown
Book of Challenges: Dungeon Rooms, Puzzles, and Traps
Daniel Kaufman