Azaf

This book was written by a wizard who first caused their name to be stricken from the memories of all who knew it, then spent twenty years in the desert, listening for wisdom on the wind. The name 'Azaf' is said to resemble the voice of that desert, the night-sounds of insects and demons. The book is said to contain wickedness too terrible to be contained, and to bring madness and death to all who read it.