The Umbral Leaves

The Umbral Leaves is the grisly and unholy book of the god Zon-Kuthon, the Midnight Lord, where the tenets and laws of his faith are detailed; it is written in blood on pages of flayed skin, sometimes in a single piece from the head of a victim, so that the face is the cover. Commonly, the text is written in human blood. The Umbral Leaves is a translation of the original work, written by a mad prophet of his church, into Common.

The Umbral Leaves

In the Palatine Eye disquisition