They are The Duke’s Men—an investigative agency born out of family pride and irresistible passion . . . and they risk their lives and hearts to unravel any shocking deception or scandalous transgression!

Maximilian Cale, the Duke of Lyons, accepted long ago that his kidnapped brother was dead. When a cryptic note from investigator Tristan Bonnaud claims otherwise, Max seeks out Tristan’s sister, Lisette—and is infuriated to learn that Tristan has mysteriously vanished. Have the siblings perpetrated an elaborate hoax? Or is the fiercely protective beauty as innocent as she claims?

Fearful that the powerful duke will destroy Tristan’s career in his zeal for the truth, the clever Lisette convinces Max to accompany her to Paris in a joint search for their loved ones. But their journey takes a seductive twist when they pose as an ordinary husband and wife—not an English duke with a tarnished family name and the illegitimate daughter of a viscount—and discover an exhilarating passion free from the damning secrets of the past. With the line between danger and desire enticingly blurred, they discover that some mysteries, like those of the heart, are answered tenfold in the bliss of a true and trusting love.

Sabrina Jeffries is the New York Times and USA TODAY bestselling author of several Regency-set historical romance series, including the Royal Brotherhood, the School for Heiresses, the Hellions of Halstead Hall, the Duke’s Men, and the Sinful Suitors. When she’s not writing in a coffee-fueled haze, she’s traveling with her husband, caring for her adult autistic son, or indulging in one of her passions: jigsaw puzzles, chocolate, music, and costume parties. With more than nine million books in print in twenty languages, the North Carolina author never regrets tossing aside a budding career in academics for the sheer joy of writing fun fiction and hopes that one day a book of hers will end up saving the world. She always dreams big.