Oh man, these books... 
 Rose Under Fire is not a sequel more properly a companion novel of Code Name Verity, but it does take place after the events of the first book, and there are snippets of continuation (which I adored). The book focused again on a female transport pilot during WWII, except this time after D-Day, but still before the end of the war (in Europe). The historical detail that Wein weaves into her story never feels dry or forced, it just makes the story richer, and alternately more heart-breaking to know that the most horrific parts are not imagined. Ultimately, the characters in Code Name Verity appealed to me more, but I still enjoyed reading Rose's point of view in this book and her initially less jaded perspective.