"When darkness reaches the house of the Lord, the light in our hearts must shine all the brighter!" - Prince-Illuminata Gwiduhenna of Faldahon, 1034 BF. How does the canon sound in greeting the sun? What actions does the priest perform during Praios' magic ban? What does the priestess see with Darador's scrutinizing gaze? What do order, truth, and justice mean to the followers of Praios? And what is their stance on magic? What currents and orders exist, and which of them are recognized by the Messenger of Light? What powers does an inquisitor have, and how is one elevated to that position? For what was Owilmar of Gareth canonized? What is the revelation of the sun? This volume provides answers to such questions, complementing and deepening the texts from Paths of the Gods. The Praios Vademecum contains a wealth of Aventurian background material about the Community of Light, the Church of the God Prince.