Get ready to fly or die in the breathtaking follow-up to Fourth Wing and Iron Flame from #1 New York Times bestselling author Rebecca Yarros.

When a chance encounter sparks an unlikely bond between rival murderers Sloane and Rowan, the two find something elusive—the friendship of a like-minded, pitch-black soul. From small-town West Virginia to upscale California, from downtown Boston to rural Texas, the two hunters collide in an annual game of blood and suffering, one that pits them against the most dangerous monsters in the country.

In a place known as the Ledge, a civilization is trapped by a vast chasm and sheer mountain face. There is no way for anyone to escape the frozen wasteland without befalling a deathly drop. They know nothing of the outside world except that it is where the Glacians reside—mystical and vicious winged creatures who bring meager rations in exchange for a periodic human sacrifice.

Hidden in the shadow of her controlling father, General Evander of Auryna, Ara has never tasted true freedom. For most of her life, she's been locked away in his estate as he is determined to protect her from the bloodthirsty Fae across the border. As her twenty-sixth birthday comes and goes, he decides it's time for her to marry, against her wishes and completely unbeknownst to her. Ara's fate is sealed the moment he announces her engagement.

Marlow needs to believe she's crazy. The alternative would mean embracing the gift—or curse—shared by her mother and grandmother: she can see angels and demons, including a dark and haunting entity who's been with Marlow her entire life. At least, she believes that's all he is until a fae from the Nordic pantheon strolls into her life and informs her that she's been sharing a bed with the Prince of Hell.