I'm not usually a fan of flashbacks to tell the story, but in this case, it was used to excellent effect as Nadia comes to grips with her past. I don't want to ruin it; suffice it to say that Nadia was part of the Nazi's Lebensborn program. I can't think of another middle grade book about this topic, so here's another WWII book that is essential to have in my collection! The fact that it is set post-war is interesting as well, since students don't have a very good picture of what happened during the enormous diaspora following the war. Ivan, Marusia, and the entire community were touching to read about, since they were so supportive and dedicated to making a life after their horrible experiences.
There's a tie in with Making Bombs for Hitler, and keen readers will put these pieces together.
Skrypuch is becoming the Carol Matas of Holocaust books, and one of the few writers to have books that discuss what happened afterwards, along with Matas' After the War, Whelan's After the Train. Readers who have already read plenty of tales set in Europe during this time period, like Spradlin's The Enemy Above, Nielsen's Resistance, Hesse's Girl in the Blue Coat and Stamper's What the Night Brings will find Nadia's story a compelling continuation of the horror of the Holocaust.