This lady is not at all a paragon of society... Lady Bronwyn Chase leaves London on her brother's passenger liner bound for America with a packet of secret letters that could get her into trouble. Serious trouble—the kind a duke's sister shouldn't be in; the kind that puts spymaster Valentine Medford, the Duke of Thornbury, on her trail. But as the duke gets closer to Bronwyn and the secrets she's keeping, he'll have to decide between the mysterious woman who calls to him, or his allegiance to the Crown. Praise for the Daring Dukes series: "Vivid, sensual and beautifully written... Amalie Howard tells a story with self-assured style, wit, and energy, making the book impossible to put down."— Lisa Kleypas , New York Times bestselling author, for The Princess Stakes "Amalie Howard is the fresh voice historical romance needs right now... I will read every word she writes."— Kerrigan Byrne , USA Today bestselling author "Adventurous!"—Publishers Weekly for Rules for Heiresses