The Winter of the Witch - Katherine Arden (Book 3)

Vasilisa, a girl with extraordinary gifts, must flee for her life, pursued by those who blame their misfortune on her magic. Then a vengeful demon returns, stronger than ever. Determined to engulf the world in chaos, he finds allies among men and spirits.

Mankind and magical creatures alike find their fates resting on Vasya's shoulders. But she may not be able to save them all. 'heart-stoppingly good...beautifully written, this adventure shimmers and shines with magic of all kinds.