A hidden heart. A captive soul. A chance for redemption.

Beneath the glittering streets of New London, the Cutthroat King rules the criminal underground with a heart as cold as ancient stone. They say he is a monster. And Willow Bowbriar needs a monster.

Desperate to rescue her kidnapped father and save her artifice repair shop from debt collectors, Willow offers her services to the Cutthroat King in exchange for his help. But he wants more than her skills-he wants her.

Living in the Unseen Court thrusts Willow into a perilous game of power and deception, where she must protect herself not only from the King's enemies but from the King himself.

When secrets unravel and enemies close in, she faces an impossible choice: trust the Cutthroat King with her life-and her heart-or risk losing everything.

Hades and Persephone meets Beauty and the Beast in the Victorian criminal underground, this gaslamp fantasy romance is a companion novel to The Gwen St. James Affair.