The Captured Bride by Michelle Griep

Mercy was called a "Half Breed" by strangers, but those who knew her were fiercely respectful and loyal, sure of her skills . Matthew Prinn , a ranger had been her partner for three years. He respected her more than most men he knew, but he knew her temper and fierce determination could be her downfall. An assignment had her pretending to be wed to Elias Dubois, a French traitor. 

Sent on a dangerous mission, could they succeed? What would she see in the traitor, DuBois?

Michelle Griep has crafted a story of the French and Indian war, that will keep you on your toes in it's twists and turns. Satisfying and intense, it is a pleasurable read!