2019 · ソースブック（プレイを拡張するルール／オプション）
The Cthulhu Alphabet
An A-to-Z reference for creating Lovecraftian adventures in fantasy and horror role-playing games. Each entry provides eerie ideas, forbidden lore, dangerous powers, and random tables for developing cults, creatures, locations, artifacts, and other elements of madness-inducing stories. Atmospheric text and unsettling illustrations support game masters in building scenarios inspired by ancient powers and occult discoveries.
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。