The New York Times-bestselling author Elizabeth's Wein's companion book to Code Name Verity, now in paperback.      Rose Justice is a young pilot with the Air Transport Auxiliary during the Second World War. On her way back from a semi-secret flight in the waning days of the war, Rose is captured by the Germans and ends up in Ravensbrück, the notorious Nazi women's concentration camp. There, she meets an unforgettable group of women, including a once glamorous and celebrated French detective novelist whose Jewish husband and three young sons have been killed; a resilient young girl who was a human guinea pig for Nazi doctors trying to learn how to treat German war wounds; and a Nachthexen, or Night Witch, a female fighter pilot and military ace for the Soviet air force. These damaged women must bond together to help each other survive.     In this companion volume to the critically acclaimed novel Code Name Verity, Elizabeth Wein continues to explore themes of friendship and loyalty, right and wrong, and unwavering bravery in the face of indescribable evil.