From publisher blurb:
Become a Master of Magic!
The biggest, most extensive, most ambitious release for Shadow of the Demon Lord so far, Occult Philosophy kicks down the doors and unleashes over 800 spells into your games. With new options for the 39 existing traditions plus the brand-new Madness tradition, this book is a must have for master, novices, and, yes, even expert fans of the game. In addition, this book supplies you with over 20 new expert paths, 40 new master paths, and a bundle of delicious creatures for conjuration and control. The Demon Lord is on the way. Grab this book and put an end to the nightmare affecting your world!