3. On Wings of Fire, the third in the series, takes place in World War II, with a convoluted love relationship between the second generation: Alpharetta, who flies with the WASPs, (the Women’s Air Service Pilots) and goes on a dangerous secret mission; Belline, Steppie’s adopted daughter, who is a member of the USO;; Ben Mark, a pilot with the U.S. 8th Air Force, and “Marsh” Wexford, a paratrooper with the 82nd Airborne, whose heroic exploits from Sicily to Operation Market Garden highlight the role of the pathfinders.