England, 1815.

When a bookish codebreaker and a dashing spy are reunited, their lives depend on their ability to resist temptation. But fate is a mistress who cannot be denied. . .

Codebreaker Heloise Hampden is a high-value asset to the Crown. When she cracks the enemy's most recent code, French agents are sent to silence her, but it's the agent assigned to protect her who poses the greatest threat to her heart: William de l'Isle, Viscount Ravenwood.

Raven's imprisonment six years ago has made him wary of love, but his heart still pounds whenever he's within ten paces of Heloise. He's a shadowed Hades pining for sun-kissed Persephone, but he'll do whatever it takes to keep her safe—even if that means taking her to Spain as an unwilling hostage.

Protecting her from danger will be a challenge; protecting her from desire will be pure agony.