Two Twisted Crowns by Rachel Gillig

In the dark, spellbinding sequel to One Dark Window, Elspeth must confront the weight of her actions as she and Ravyn embark on a perilous quest to save the kingdom-perfect for readers of Hannah Whitten's For the Wolf and Alexis Henderson's The Year of the Witching.
Gripped by a tyrant king and in the thrall of dark magic, the kingdom is in peril. Elspeth and Ravyn have gathered most of the twelve Providence Cards, but the last-and most important-one remains to be found: the Twin Alders. If they're going to find the card before Solstice and set free the kingdom, they will need to journey through the dangerous mist-cloaked forest. The only one who can lead them through is the monster that shares Elspeth's head: the Nightmare.
And he's not eager to share any longer.
Praise for One Dark Window:
"Enthralling from beginning to shocking end." -Hannah Whitten, New York Times bestselling author of For the Wolf
"Pulse pounding, darkly whimsical, and aglow with treacherous magic." -Allison Saft, New York Times bestselling author of A Far Wilder Magic
The Shepherd King
One Dark Window
Two Twisted Crowns