Shadow of His Wings (Appomattox Saga #6) by Gilbert Morris

n the Appomattox Saga, the United States' most terrible war is the backdrop for adventure, romance, and the power of God to move amidst tragedy.
Lowell Rocklin accepts a challenge to help the South build a balloon for use in military strategy. His efforts are aided by Rooney Smith, a young woman whose ingenuity proves invaluable. Suddenly, double tragedy strikes: Seriously injured in battle, Lowell must also suffer with his discovery of the tragic truth about Rooney ― the woman he has come to love.