His Mysterious Lady — G.G. Vandagriff

Prolific author G.G. Vandagriff creates a world full of intrigue, suspense, and romance that fans of the Regency Period will adore. Vandagriff writes in a style reminiscent of Georgette Heyer."--Deseret News.
It is 1813, and England is at war with America. Viscount Anthony Strangeways' life is upended when he meets an American lady, Virginia Livingstone, His best friend who works in the Foreign Office thinks she is a spy, but Tony sees in her a rare openness and sincerity he has always wanted in a woman. Which of them is right?
After she suffers a ballooning accident Virginia loses her memory. A man she cannot remember meeting calls on her, informing her privately she is an American spy. Can she believe him? And, as an American patriot, can she really be in love with a English Viscount?