Code Name Kingfisher by Liz Kessler

 

This World War II story set in Holland features two sisters, Hannie and Mila. It is 1942 and the danger to Jewish people is rapidly increasing. The girls' parents find a non-Jewish family that will take the sisters, so the book begins with Mila and Hannie saying goodbye to their parents, possibly never to see them again. It's a dual timeline story, and in the modern day, a girl named Liv is trying to get to know her grandmother "Bubbe" better when she finds a box of papers in her attic. The story goes from past to present, and in the past we see the older sister Hannie get involved in the resistance by saving Jewish children from certain death. Mila is 12 years old, and the book has a solidly middle grade feel, but traumatic things happen and the brutality of the Nazis is evident. It's a compelling story that will appeal to historical fiction readers from 4th-7th grades. It has a lot of similarities to The Lost Year by Katherine Marsh, and readers who enjoyed Blackbird Girls and The War that Saved My Life will definitely want to read it.