A Train In Winter

They were teachers, students, chemists, writers, and housewives; a singer at the Paris Opera, a midwife, a dental surgeon. They distributed anti-Nazi leaflets, printed subversive newspapers, hid resisters, secreted Jews to safety, transported weapons, and conveyed clandestine messages. The youngest was a schoolgirl of fifteen who scrawled "V" for victory on the walls of her lycEe; the eldest, a farmer's wife in her sixties who harbored escaped Allied airmen. Strangers to each other, hailing from villages and cities from across France, these brave women were united in hatred and defiance of their Nazi occupiers.
added Thanks to saimoh76

To Kingdom Come: An Epic Saga of Survival in the Air War Over Germany

Many books have been written about the 8th US Air Force ,but I found " To Kingdom Come" most unique. The book chronicles the lives of several airmen who flew bombing missions over Germany during World War II.