Tomes of Dark SecretsTomes of Dark Secrets brings a new level of horror to your 5E campaign with sinister spellbooks and creepy compendiums of eldritch lore that delve deeply into secrets man was not meant to know! Youll find five richly detailed books of magic herein, each with detailed history and lore, unique secrets to offer, and a terrible price to pay for that power. On the Inverse Calculus of Unseen Refraction probes the unseen depths of alchemy, invisibility, and