For fans of The Raven Boys. Anne's near-death experience triggers the dreaded Fimbul Winter, heralding the arrival of Ragnarok. Now, as eternal winter grips the Nordic region, Anne and her allies are thrust into a desperate battle to thwart the end of the world. But treachery lurks within their ranks - one of her closest has betrayed her, yet she remains in the dark about their identity. As some begin to ponder if Ragnarok might be the lesser of evils, Anne faces a crucial choice: to seek aid from a place she vowed never to revisit, and from those she has wronged deeply. Will they come to her aid? Time is running out, and Anne is prepared to make unimaginable sacrifices to prevent catastrophe. Can she stop the apocalypse in time?