«The Black Knave» by Patricia Potter

A nobleman living a dangerous double life weds a rebellious Jacobite beauty—the first in a Scottish romance trilogy by a USA Today–bestselling author.
Some call him the devil. Few have ever seen him. He is the Black Knave. Named for the playing card he leaves behind, he risks his life to smuggle Jacobite insurgents out of Scotland right under the noses of the British. And Bethia MacDonell is determined to find him. She needs the legendary freedom fighter to rescue her imprisoned brother. Instead, she is forced into an arranged marriage of political expediency. Her bridegroom is Rory Forbes, an aristocrat loyal to the crown. A coward at the Battle of Culloden. A traitor to his own people.
To the world he is a fop and wastrel who lives solely for his own pleasure. But the new Marquis of Braemoor harbors a dangerous secret he must keep hidden at all costs. Bethia is the wild card, arousing treacherous desire that could doom Rory’s mission and imperil her life. Sworn to protect her, the most wanted man in Scotland must fight his greatest battle to win the heart of the one woman he desires above all others: his wife.
Named “Storyteller of the Year” by the Romantic Times, Patricia Potter introduces one of her most irresistible heroes, and offers “well-drawn, memorable characters [and] compelling action,” in the first book in her enthralling Scottish trilogy that continues with The Heart Queen and The Diamond King (Library Journal).