The instant New York Times bestseller Can you love the dark when you know what it hides? Some things aren't supposed to exist outside of our imagination. Thirteen years ago, monsters emerged from the shadows and plunged Kierse's world into a cataclysmic war of near-total destruction. The New York City she knew so well collapsed practically overnight. In the wake of that carnage, the Monster Treaty was created. A truce...of sorts. But tonight, Kierse—a gifted and fearless thief—will break that treaty. She'll enter the Holly Library...not knowing it's the home of a monster. He's charming. Quietly alluring. Terrifying . But he knows talent when he sees it; it's just a matter of finding her price. Now she's locked into a dangerous bargain with a creature unlike any other. She'll sacrifice her freedom. She'll offer her skills. Together, they'll put their own futures at risk. But he's been playing a game across centuries—and once she joins in, there will be no escape...