Two interviews with Elizabeth Wein.

One at HuffPo:

Well, World War II Britain is easy for me, because I do sort of live in the mortal remains here.  The debris of the war is all around me.  Every house on my street has got iron stubs in its garden wall where the rails were cut down for scrap iron.  There are concrete anti-landing defenses on the nearby beaches.  There is an almost-intact German prisoner of war camp about 7 miles away from my kids' school -- my son and I were snooping around it two days ago.  My first flying lesson was at the airfield that used to be the ATA headquarters.

One at Kirkus:

I think, actually, the pressure comes because it’s considered a children’s book. I’m under the impression that with historical fiction, or fiction set in an historical period, that the bar is much higher for accuracy. Not just in getting the historical details right, but for editing and copy editing children’s literature, I feel there are higher expectations than stuff that’s aimed at adults.

Need I remind you of just how much I adored Code Name Verity?