From publisher blurb: Unlock the Secrets of Dark Sorcery... Open the Crimson Pandect to reveal the hidden arts of the arcane world and the grim obsessions that snare the minds of their adepts. This book is for both players and Labyrinth Lords alike, providing tools for weaving grim tales of blood and unleashed sorcery! Use new classes, new spells, and new guidelines for magical research. plunder ancient troves of occult lore to fuel your arcane ascension. Use the new guide for sanctum construction and the tools for cult and cabal creation to fashion sorcerous towers and malevolent foes. While built for the Red Tide: Campaign Sourcebook and Sandbox Toolkit, the contents are all designed to be easily and swiftly transferred into your own old-school campaign world. Six variant classes for magic-users, each with their own spell list and focused theme: the elementalist yamabushi of the Mountain Way, the wonder-working internal alchemists of the Nine Immortal Art, the Makerite Theurges and their burning incantations, the grim Kuan Amelatu and their vengeance for the dead, the prophetic seers of the Astromancers, and the flesh-bending, degenerate science of Shakunasar. Give your players a good reason to want more than mere spellbooks. With new rules for research points and labwork, watch them scramble to plunder the libraries of their foes and delve deep in the earth for the secrets of lost pre-human races. These new tools let them spend their hard-won lore to learn new spells, create magic items, fabricate new enchantments, and spawn horrific monsters. Help your mages build their wizard's towers and hidden sanctums. Find rules and costs for the construction of arcane lairs and the acquisition of minions, the better to protect a mage's precious library and ease his fearsome studies! Labyrinth Lords have a fistfull of tools for generating arcane academies, sorcerous cults, and secretive conclaves. Need maddened worshipers of eldritch darkness? Turn to the tables in this section to give your pack of maniacs the flavor and style you need to make them crackle! Resources for quick wizard characterization, fast spellbook lists, instant arcane tome generation, and lists of random occult treasures all smooth the creation of a Labyrinth Lord's awful minions!