So Pure a Heart: Daughters of His Kingdom, Volume 4 (Unabridged‪)‬

Since the night her dear uncle gave his life for hers, Hannah Young is determined to risk everything by spying for the Patriots in order to seek retribution against the British soldier who killed him. But when her former love, Joseph Wythe, insists on ensuring her safety, she must decide if the vengeance she seeks is worth the danger of his nearness. For the love she once felt is liable to grow deeper and more threatening to her heart than it ever was before. Leaving his young ward to join the fight for liberty is the hardest thing Joseph Wythe has ever done. Nearly. The most difficult happened ten years past, which he tries his best to forget. Seeing Hannah Young again after all this time does something frightening and wonderful to his soul. Though her determination to spy for the Patriots is honorable and brave, he will never allow her to take such a risk without him to protect her, no matter how she protests—and no matter how he knows he will ache all the more for the thing he always wanted and still could never have.