The Green Book of Murthock

Publisher's blurb: A resource for any game based on the Cthulhu Mythos: details of an arcane tome, packed full of dreadful lost knowledge and containing spells that could send even the most rational of investigators spiralling into madness. As well as giving full details of a variety of related books and the spells they hold, this resource includes some sample pages to give out to your players. Designed to be usable with any rules system that makes use of the Cthulhu Mythos setting.