A reaper at the gates
(Book)

"The Blood Shrike, Helene Aquilla, is assailed on all sides. Emperor Marcus, haunted by his past, grows increasingly unstable, while the Commandant capitalizes on his madness to bolster her own power... the lives of all those in the Empire hang in the balance. Far to the east, Laia of Serra knows the fate of the world lies in stopping the Nightbringer. But while hunting for a way to bring him down, Laia drawn into a battle she never thought she'd have to fight. And in the land between the living and the dead, Elias Veturius has given up his freedom to serve as Soul Catcher. He has vowed himself to an ancient power that will stop at nothing to ensure Elias's devotion-- even at the cost of his humanity." --,(Source of summary not specified)