Great to read your review, Primrose. As you rightly said, it is a very moving story.
On the topic of WWII, have you read "Maus", a graphic novel by American cartoonist Art Spiegelman?
I find the cartoons overwhelming, the message is very powerful.
It's hard for me to explain because it evokes similar reactions as "The Book Thief". Art Spiegelman was born in Sweden to parents who were Holocaust survivors. His brother, Richieu, did not survive, having been poisoned by an aunt in order to avoid capture by the Nazis four years before Art was born. He immigrated with his parents to the United States in 1951.
Growing up, his mother would occasionally talk about Auschwitz, but his father didn't want him to know about it. Because his father wouldn't talk openly about the Holocaust, Spiegelman interviews him about his experiences as a Polish Jew and Holocaust survivor. The book (originally serialised) uses post-modern techniques and depicts different races of humans as different breeds of animal, with Jews as mice - hence "Maus" - Germans as cats and Poles as pigs. Sometimes labelled memoir, biography, history, fiction, a mixture of genres with a chilling subtitle A Survivor's Tale - My Father Bleeds History.
It was the first comic book to win a Pulitzer Prize. But definitely not one for kids.
"Every story has three sides to it - yours, mine and the facts" Foster Meharny Russell