In every generation on the island of Fennbirn, a set of triplets is born: three queens, all equal heirs to the crown and each possessor of a coveted magic. Mirabella is a fierce elemental, able to spark hungry flames or vicious storms at the snap of her fingers. Katharine is a poisoner, one who can ingest the deadliest poisons without so much as a stomach-ache. Arsinoe, a naturalist, is said to have the ability to bloom the reddest rose and control the fiercest of beasts.

But becoming the Queen Crowned isn’t solely a matter of royal birth. Each sister has to fight for it. And it’s not just a game of win or lose . . . it’s life or death. The night the sisters turn sixteen, the battle begins.

The last queen standing gets the crown.

The battle for the crown has begun, but which of the three sisters will prevail?

With the unforgettable events of the Quickening behind them and the Ascension Year underway, all bets are off. Katharine, once the weak and feeble sister, is stronger than ever before. Arsinoe, after discovering the truth about her powers, must figure out how to make her secret talent work in her favour without anyone finding out. And Mirabella, once thought to be the strongest sister of all and the certain Queen Crowned, faces attacks like never before – ones that put those around her in danger that she can’t seem to prevent.

Queen Katharine has waited her entire life to wear the crown. But now that she finally has it, the murmurs of dissent grow louder by the day. There’s also the alarming issue of whether her sisters are actually dead—or if they’re waiting in the wings to usurp the throne.

Mirabella and Arsinoe are alive, but in hiding on the mainland and dealing with a nightmare of their own: being visited repeatedly by a specter they think might be the fabled Blue Queen. Though she says nothing, her rotting, bony finger pointing out to sea is clear enough: return to Fennbirn.  

Jules, too, is in a strange place—in disguise. And her only confidants, a war-gifted girl named Emilia and her oracle friend Mathilde, are urging her to take on a role she can’t imagine filling: a legion-cursed queen who will lead a rebel army to Katharine’s doorstep.

This is an uprising that the mysterious Blue Queen may have more to do with than anyone could have guessed—or expected.

After the grim confrontation with Queen Katharine, the rebellion lies in tatters. Jules’s legion curse has been unbound, and it is up to Arsinoe to find a cure, even as the responsibility of stopping the ravaging mist lies heavy on her shoulders, and her shoulders alone. Mirabella has disappeared.

Katharine’s reign remains intact—for now. When Mirabella arrives, seemingly under a banner of truce, Katharine begins to yearn for the closeness that Mirabella and Arsinoe share. But as the two circle each other, the dead queens hiss caution—Mirabella is not to be trusted.

In this conclusion to the Three Dark Crowns series, three sisters will rise to fight as the secrets of Fennbirn’s history are laid bare. Allegiances will shift. Bonds will be tested. But the fate of the island lies in the hands of its queens. It always has.