On the island of Zakynthos, nothing is more powerful than Desire—love itself, bottled and sold to the highest bidder by Leandros, a power-hungry descendant of the god Eros. Eirene and her beloved twin sister, Phoebe, have always managed to escape Desire’s thrall—until Leandros’s wife dies mysteriously and he sets his sights on Phoebe. Determined to keep her sister safe, Eirene strikes a bargain with Leandros: If she can complete the four elaborate tasks he sets her, he will find another bride.

The demon Vitrine—immortal, powerful, and capricious—loves the dazzling city of Azril. She has mothered, married, and maddened the city and its people for generations, and built it into a place of joy and desire, revelry and riot. And then the angels come, and the city falls. Vitrine is left with nothing but memories and a book containing the names of those she has lost—and an angel, now bound by her mad, grief-stricken curse to haunt the city he burned.

When Crown Princess Aria sees her kingdom on the brink of war with the magic-wielding Casters, she takes it upon herself to speak with the Widow Morton, the most dangerous Caster in the realm. If successful, Aria will not only ensure peace but also prove to her father that she is a worthy heir. But when her negotiations fail, Aria is dealt a terrible curse: Over the course of one hundred days, she will be unable to sleep, her body and mind doomed to waste away. And then the curse will pass to her sister, until every member of the king’s line is dead.

1890, Lutèce: In this city, Talents are everything: precious gems that gift unrivalled skills to their owners. The most coveted, Elite Talents, are claimed by the aristocracy, passed through generations by blood magic. Cleodora dreamed of inheriting her father's Tailoring Talent, but when he died, the magic died with him. Now she’s left with empty promises, a dress shop she can’t keep afloat, and her bed-ridden younger sister. But everything changes when she meets the dark-eyed Lady Dahlia Sibille.

Within Tiveden Forest, bloodthirsty monsters known as draugr lurk behind every tree, and secrets run through the soil like twisted roots. When her grandmother vanishes into the forest, Astrid won’t let Crohn’s disease get in the way of finding her. But in searching for her lost loved one, Astrid soon uncovers an even greater mystery: A conflict that’s haunted her village and family for generations. An ancient blood oath her ancestor made to protect them. A deadly draugr imprisoned for centuries…who Astrid accidentally awakens.