2021 · ソースブック（プレイを拡張するルール／オプション）
Adventurers Spellbook
A comprehensive reference for spellcasters in Castles & Crusades, collecting spells from the Players Handbook, Adventurers Backpack, Players Guide to Aihrde, Amazing Adventures, Hallowed Oracle Players Guide, and Elemental Spells. It also includes the complete Codices of Rune Spells, with more than 200 rune spells covering the Shadow Runes, the Four Pillars, and other sources. Tables and information for the Chromatic Mage are included as well.
属性／ステータス制（STR、CON、PERなど）レベル制（XPを獲得してレベルアップ）ダイス（主にd20）
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。