She’s holding a razor to his throat. He’s holding all the secrets.

Lady Theodora Langford’s world died with her brother. Branded a traitor and executed in disgrace, her brother's only legacy is a bloodied military insignia and a whispered rumor of a conspiracy. To clear his name, Thea must do the unthinkable: she cuts her hair, dons breeches, and infiltrates the household of the man who sent her brother to the gallows.

The mission is simple: Infiltrate. Investigate. Escape.

Duncan Sinclair, the formidable Duke of Ravenshire, is a man of cold steel and dangerous shadows. As his new valet, Thea is closer to him than any woman should be—shaving his chin each morning while fighting the treacherous urge to touch him. She expected to find a monster. Instead, she finds a man haunted by the same ghosts she is, conducting a secret investigation that could topple the British High Command.

He’s known her secret from the very first day.

Duncan isn't fooled by "Thomas Lane" for a second. He’s been playing a cat-and-mouse game, waiting to see how far this brave, beautiful imposter will go. But when an assassin’s blade forces their hands, the deception ends and a dangerous alliance begins.

Bound by a common enemy and a desire that burns hotter than a summer scandal, Thea and Duncan must navigate a web of treason that threatens the Crown itself. In a world where one misstep means the noose, the greatest risk isn’t losing their lives—it’s losing their hearts to the one person they were never supposed to trust.

In the Duke’s Service is a spicy Regency romance featuring a cross-dressing heroine, a brooding war-hero Duke, and a slow-burn forced proximity that will keep you breathless. Perfect for fans of Tessa Dare and Lisa Kleypas.