Mackenzie's Mountain
Book 1, 1989
When spinster schoolteacher Mary Elizabeth Potter confronts Wolf Mackenzie in order to get Wolf's son back in school, she comes face to face with a bitter and dangerously attractive man still paying for a crime he did not commit.

Mackenzie's Mission
Book 2, 1992
Night Wing-the revolutionary test plane with a top-secret weapons system-was Colonel Joe "Breed" Mackenzie's number-one priority. And weapons expert Caroline Evans was his number-one distraction. True, the stubborn blonde was giving him the cold shoulder, but Joe hadn't become the best of the best by giving up. Then he discovered someone on the inside was sabotaging Night Wing, and with her late hours and specialized expertise, Caroline seemed the obvious choice. Now Joe had to choose between allegiance to his country and love for his prime suspect...