A Shadow of Crows (The Wild Hunt, #4)

As autumn approaches and Ember approaches the Cruharach, a revelation rocks Herne's world that threatens their relationship. In the middle of the chaos, the Wild Hunt is approached by Raven, one of the Ante-Fae. A bone-witch, Raven hires them to find her missing fiancé. The spirits have warned her that he's in danger.

As the Wild Hunt follows a trail of blood and bones, it leads them into a labyrinth of grisly deaths extending far beyond Raven's lost love. A serial killer is murdering humans...