She is threatened with her most challenging assignment yet, and it has nothing to do with the military.Life is never the same for Kate Langston, working in Security Forces at Scott Air Force Base, IL. She never knows what each day may bring. She and her boyfriend, John Kern, could get sent anywhere in the world at any time, while serving and protecting the country they love.But when tragedy strikes, Kate is devastated, and can barely function. And after a secret is revealed, it shatters Kate's quiet and ordered life. Friend and colleague Spencer Coleman willingly helps Kate, hoping he can become more than a friend.In Heir Force, join Kate in her inspirational journey and discover how she overcomes the many changes that take place in her life, and her heart.