I just finished reading Hearts in Flight by Patty Smith Hall, and let me start by saying that I read this book WAY faster than anything I've read in the past few years. It was exciting from the start, and didn't disappoint in any aspect.
The setting is 1943 Georgia, in a small town, with a girl who's grown up flying planes. First for her father's crop-dusting business, and now as a member of the WASP - Women's Army Special Pilots. Maggie Daniels gets a job at a military plane-building plant, helping to inspect, work on, and transport aircraft. The thing is, no one thinks she has any business being there. Not her family, not the men in her squad, and especially not her commander, Wesley Hicks. But she's determined to follow her dream, and prove to everyone that she can do anything a guy can.
But it's no smooth sailing. Wesley's got a secret from his past that affects how he feels about woman pilots, Maggie's uncle will do anything he can to get back the house he thinks is rightfully his - the house where Maggie and other plant workers have been renting rooms from her aunt, and someone's leaving threatening notes aimed at the WASPs.
For more high-flying adventures, check out The High Calling and A Time of War, both by Gilbert Morris.