The Keeper's Companion: Blasphemous Knowledge, Forbidden Secrets: A Core Book for Keepers, Vol. 1 (Call of Cthulhu Horror Roleplaying, #2388)

The Keeper's Companion 2: Prohibition, Firearms, Tomes, & Creatures (Call of Cthulhu roleplaying)

The Grand Grimoire of Cthulhu Mythos Magic

Doors to Darkness (Call of Cthulhu Roleplaying)

Call of Cthulhu Investigators Handbook (Call of Cthulhu Roleplaying)

The Investigator's Companion: A Core Game Book for Players (Call of Cthulhu roleplaying)

S. Petersen's Field Guide to Lovecraftian Horrors: A Field Observer's Handbook of Preternatural Entities and Beings from Beyond the Wall of Sleep (Call of Cthulhu Roleplaying)

Shadows of Yog-Sothoth: A Global Campaign to Save Mankind (Call of Cthulhu Horror Roleplaying)

Secrets Of New York: A Mythos Guide to the City That Never Sleeps (Call of Cthulhu Horror Roleplaying)

Call of Cthulhu Rpg Keeper Rulebook: Horror Roleplaying in the Worlds of H.p. Lovecraft (Call of Cthulhu Roleplaying)

Mansions of Madness (Call of Cthulhu Horror Roleplaying, 1920s Era)