book description:

Her duty is to die. The war she wages is a lonely one. Winning it seems impossible. So why does she keep fighting, when she was never meant to survive?

As a Hunter for The Order Laviv has one goal: Slay every creature that roams the forest at night, or die trying. But what has once been a noble duty to fulfill has become a hopeless chase against time, especially after losing her whole squad in three tragic circumstances five years ago.
Since then she is a shadow of herself, a weapon that kills when it is told and sleeps when the nightmares let her. But when history repeats itself and Laviv stands before the same tragedy she has lived through five years ago, leading to her injuring an innocent, she has to make a choice: drag herself though this life, doomed to repeat the same cycles, or make a choice that scares her more than any monster ever had: taking on the responsibility of being a teacher for a boy that is unlikely to survive without her. 

Trying to keep her new apprentice alive Laviv gets confronted with her own failures as well as some strange changes happening in the heart of their organization. Something brews deep within the belly of the beats and when all answers lead to the one person she has sworn to one day get her revenge on, she must decide who to trust, what to believe, and what it is, that’s not only worth dying—but living for.