In Revolutionary-era Philadelphia, a fiercely independent young widow is enlisted as an unlikely spy in this riveting novel of danger and sweeping romance by the bestselling author of The First Witch of Boston.

Philadelphia, 1776. Beautiful and precocious Alexandra MacInnes, indulged by her single father, grows up highly educated. She also learns about seduction early on, after secretly befriending her father’s mistress. But when Alexandra falls deeply in love with a passionate businessman who abruptly ends their courtship, not even marriage to another admirer can heal the wound—one made even greater when Alexandra is widowed by war.

When the Continental Congress meets in Philadelphia, Alexandra connects with General George Washington, who recruits her for various acts of espionage. After testing her intellect, dedication, and feminine charms, Washington requests Alexandra’s help with a dangerous mission: She must seduce a Hessian colonel in the New Jersey hamlet of Mount Holly, allowing Washington’s troops to cross the Delaware undetected. Haunted by true love and dedicated to the cause, Alexandra accepts the challenge, which will change the course of the Revolution—and her life—forever.

Inspired by a real widow whose identity remains a mystery, The Widow of Mount Holly follows a woman’s journey as she navigates forbidden passion, political intrigue, and the price of female independence in a world at war.