2004 · 资料书（用于增强玩法的规则/选项）
The Book of Familiars (d20 3.0)
This d20 fantasy roleplaying supplement provides rules for characters of all eleven core classes to gain familiars or animal companions. It expands the role of these creatures beyond traditional spellcasters, offering class-specific options and guidance for adding them to existing campaigns.
基于属性/数值（STR、CON、PER 等）职业制（飞行员、巫师、科学家等）技能型（购买或获得技能）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 The Book of Familiars (d20 3.0)
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。