Call of Cthulhu: Horror Roleplaying in the Worlds of H.P. Lovecraft (Call of Cthulhu Roleplaying)

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

Call of Cthulhu Investigators Handbook (Call of Cthulhu Roleplaying)

Call of Cthulhu Keeper Screen (Call of Cthulhu Roleplaying)