Rescued from unspeakable horror, Ishbel Brunelle has devoted her life to the Order of the Coil, a sacred cult that reads the future in the entrails of its human sacrifices. But the Serpent has loftier plans for the archpriestess, and an eerie, eldritch warning: Prepare for the Lord of Elcho Falling . . .

Perils abound in a realm beset by treachery, and above all looms the DarkGlass Mountain—once known as the Threshold—as the terrible Dark God Kanubai prepares to emerge from his prison in exile.